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Finding the Fourth Proportional to 63,669.79, 87,840.47 and 39,459.70

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Solution

The fourth proportional to 63,669.79, 87,840.47 and 39,459.70 is: 54,439.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,669.79 : 87,840.47 = 39,459.70 : x
  2. Step 2: Convert to fraction form
    63,669.79/87,840.47 = 39,459.70/x
  3. Step 3: Cross multiply
    63,669.79x = 87,840.47 × 39,459.70
  4. Step 4: Simplify right side
    63,669.79x = 3,466,157,957.56
  5. Step 5: Solve for x
    x = 3,466,157,957.56/63,669.79
  6. Step 6: Final answer
    x = 54,439.61

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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.