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Finding the Fourth Proportional to 78,937.59, 108,935.45 and 43,129.82

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Solution

The fourth proportional to 78,937.59, 108,935.45 and 43,129.82 is: 59,520.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,937.59 : 108,935.45 = 43,129.82 : x
  2. Step 2: Convert to fraction form
    78,937.59/108,935.45 = 43,129.82/x
  3. Step 3: Cross multiply
    78,937.59x = 108,935.45 × 43,129.82
  4. Step 4: Simplify right side
    78,937.59x = 4,698,366,350.12
  5. Step 5: Solve for x
    x = 4,698,366,350.12/78,937.59
  6. Step 6: Final answer
    x = 59,520.01

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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.