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Finding the Fourth Proportional to 99,336, 137,112.84 and 59,078.28

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Solution

The fourth proportional to 99,336, 137,112.84 and 59,078.28 is: 81,545.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,336 : 137,112.84 = 59,078.28 : x
  2. Step 2: Convert to fraction form
    99,336/137,112.84 = 59,078.28/x
  3. Step 3: Cross multiply
    99,336x = 137,112.84 × 59,078.28
  4. Step 4: Simplify right side
    99,336x = 8,100,390,753.12
  5. Step 5: Solve for x
    x = 8,100,390,753.12/99,336
  6. Step 6: Final answer
    x = 81,545.37

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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.