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Finding the Fourth Proportional to 78,346.71, 117,522.81 and 25,760.25

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Solution

The fourth proportional to 78,346.71, 117,522.81 and 25,760.25 is: 38,641.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,346.71 : 117,522.81 = 25,760.25 : x
  2. Step 2: Convert to fraction form
    78,346.71/117,522.81 = 25,760.25/x
  3. Step 3: Cross multiply
    78,346.71x = 117,522.81 × 25,760.25
  4. Step 4: Simplify right side
    78,346.71x = 3,027,416,966.30
  5. Step 5: Solve for x
    x = 3,027,416,966.30/78,346.71
  6. Step 6: Final answer
    x = 38,641.28

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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.