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Finding the Fourth Proportional to 78,585.48, 117,878.22 and 25,980.84

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Solution

The fourth proportional to 78,585.48, 117,878.22 and 25,980.84 is: 38,971.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,585.48 : 117,878.22 = 25,980.84 : x
  2. Step 2: Convert to fraction form
    78,585.48/117,878.22 = 25,980.84/x
  3. Step 3: Cross multiply
    78,585.48x = 117,878.22 × 25,980.84
  4. Step 4: Simplify right side
    78,585.48x = 3,062,575,173.30
  5. Step 5: Solve for x
    x = 3,062,575,173.30/78,585.48
  6. Step 6: Final answer
    x = 38,971.26

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.