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Finding the Fourth Proportional to 101,239.61, 139,710.65 and 58,800.87

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Solution

The fourth proportional to 101,239.61, 139,710.65 and 58,800.87 is: 81,145.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,239.61 : 139,710.65 = 58,800.87 : x
  2. Step 2: Convert to fraction form
    101,239.61/139,710.65 = 58,800.87/x
  3. Step 3: Cross multiply
    101,239.61x = 139,710.65 × 58,800.87
  4. Step 4: Simplify right side
    101,239.61x = 8,215,107,474.26
  5. Step 5: Solve for x
    x = 8,215,107,474.26/101,239.61
  6. Step 6: Final answer
    x = 81,145.19

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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.