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Finding the Fourth Proportional to 113,729.72, 156,946.62 and 63,428.68

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Solution

The fourth proportional to 113,729.72, 156,946.62 and 63,428.68 is: 87,531.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,729.72 : 156,946.62 = 63,428.68 : x
  2. Step 2: Convert to fraction form
    113,729.72/156,946.62 = 63,428.68/x
  3. Step 3: Cross multiply
    113,729.72x = 156,946.62 × 63,428.68
  4. Step 4: Simplify right side
    113,729.72x = 9,954,916,937.06
  5. Step 5: Solve for x
    x = 9,954,916,937.06/113,729.72
  6. Step 6: Final answer
    x = 87,531.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.