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Finding the Fourth Proportional to 81,123.90, 121,570.65 and 59,898.30

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Solution

The fourth proportional to 81,123.90, 121,570.65 and 59,898.30 is: 89,762.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,123.90 : 121,570.65 = 59,898.30 : x
  2. Step 2: Convert to fraction form
    81,123.90/121,570.65 = 59,898.30/x
  3. Step 3: Cross multiply
    81,123.90x = 121,570.65 × 59,898.30
  4. Step 4: Simplify right side
    81,123.90x = 7,281,875,264.90
  5. Step 5: Solve for x
    x = 7,281,875,264.90/81,123.90
  6. Step 6: Final answer
    x = 89,762.39

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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.