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Finding the Fourth Proportional to 83,442.88, 125,426.76 and 72,486.01

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Solution

The fourth proportional to 83,442.88, 125,426.76 and 72,486.01 is: 108,956.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,442.88 : 125,426.76 = 72,486.01 : x
  2. Step 2: Convert to fraction form
    83,442.88/125,426.76 = 72,486.01/x
  3. Step 3: Cross multiply
    83,442.88x = 125,426.76 × 72,486.01
  4. Step 4: Simplify right side
    83,442.88x = 9,091,685,379.63
  5. Step 5: Solve for x
    x = 9,091,685,379.63/83,442.88
  6. Step 6: Final answer
    x = 108,956.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.