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Finding the Fourth Proportional to 63,129.71, 87,111.25 and 34,835.40

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Solution

The fourth proportional to 63,129.71, 87,111.25 and 34,835.40 is: 48,068.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,129.71 : 87,111.25 = 34,835.40 : x
  2. Step 2: Convert to fraction form
    63,129.71/87,111.25 = 34,835.40/x
  3. Step 3: Cross multiply
    63,129.71x = 87,111.25 × 34,835.40
  4. Step 4: Simplify right side
    63,129.71x = 3,034,555,151.16
  5. Step 5: Solve for x
    x = 3,034,555,151.16/63,129.71
  6. Step 6: Final answer
    x = 48,068.57

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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.