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Finding the Fourth Proportional to 86,915.64, 130,353.78 and 40,123.32

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Solution

The fourth proportional to 86,915.64, 130,353.78 and 40,123.32 is: 60,175.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,915.64 : 130,353.78 = 40,123.32 : x
  2. Step 2: Convert to fraction form
    86,915.64/130,353.78 = 40,123.32/x
  3. Step 3: Cross multiply
    86,915.64x = 130,353.78 × 40,123.32
  4. Step 4: Simplify right side
    86,915.64x = 5,230,226,428.15
  5. Step 5: Solve for x
    x = 5,230,226,428.15/86,915.64
  6. Step 6: Final answer
    x = 60,175.90

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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.