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Finding the Fourth Proportional to 86,607.80, 129,915.34 and 27,442.16

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Solution

The fourth proportional to 86,607.80, 129,915.34 and 27,442.16 is: 41,164.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,607.80 : 129,915.34 = 27,442.16 : x
  2. Step 2: Convert to fraction form
    86,607.80/129,915.34 = 27,442.16/x
  3. Step 3: Cross multiply
    86,607.80x = 129,915.34 × 27,442.16
  4. Step 4: Simplify right side
    86,607.80x = 3,565,157,470.10
  5. Step 5: Solve for x
    x = 3,565,157,470.10/86,607.80
  6. Step 6: Final answer
    x = 41,164.39

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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.