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Finding the Fourth Proportional to 78,085.56, 117,118.62 and 25,490.64

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Solution

The fourth proportional to 78,085.56, 117,118.62 and 25,490.64 is: 38,232.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,085.56 : 117,118.62 = 25,490.64 : x
  2. Step 2: Convert to fraction form
    78,085.56/117,118.62 = 25,490.64/x
  3. Step 3: Cross multiply
    78,085.56x = 117,118.62 × 25,490.64
  4. Step 4: Simplify right side
    78,085.56x = 2,985,428,579.72
  5. Step 5: Solve for x
    x = 2,985,428,579.72/78,085.56
  6. Step 6: Final answer
    x = 38,232.79

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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.