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Finding the Fourth Proportional to 78,937.91, 108,935.88 and 43,130.14

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Solution

The fourth proportional to 78,937.91, 108,935.88 and 43,130.14 is: 59,520.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,937.91 : 108,935.88 = 43,130.14 : x
  2. Step 2: Convert to fraction form
    78,937.91/108,935.88 = 43,130.14/x
  3. Step 3: Cross multiply
    78,937.91x = 108,935.88 × 43,130.14
  4. Step 4: Simplify right side
    78,937.91x = 4,698,419,321.35
  5. Step 5: Solve for x
    x = 4,698,419,321.35/78,937.91
  6. Step 6: Final answer
    x = 59,520.45

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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.