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Finding the Fourth Proportional to 90,463.56, 124,724.98 and 64,652.96

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Solution

The fourth proportional to 90,463.56, 124,724.98 and 64,652.96 is: 89,139.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,463.56 : 124,724.98 = 64,652.96 : x
  2. Step 2: Convert to fraction form
    90,463.56/124,724.98 = 64,652.96/x
  3. Step 3: Cross multiply
    90,463.56x = 124,724.98 × 64,652.96
  4. Step 4: Simplify right side
    90,463.56x = 8,063,839,142.94
  5. Step 5: Solve for x
    x = 8,063,839,142.94/90,463.56
  6. Step 6: Final answer
    x = 89,139.09

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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.