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Finding the Fourth Proportional to 61,089.28, 84,305.28 and 58,289.92

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Solution

The fourth proportional to 61,089.28, 84,305.28 and 58,289.92 is: 80,442.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,089.28 : 84,305.28 = 58,289.92 : x
  2. Step 2: Convert to fraction form
    61,089.28/84,305.28 = 58,289.92/x
  3. Step 3: Cross multiply
    61,089.28x = 84,305.28 × 58,289.92
  4. Step 4: Simplify right side
    61,089.28x = 4,914,148,026.78
  5. Step 5: Solve for x
    x = 4,914,148,026.78/61,089.28
  6. Step 6: Final answer
    x = 80,442.07

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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.