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Finding the Fourth Proportional to 64,381.79, 96,587.60 and 20,006.15

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Solution

The fourth proportional to 64,381.79, 96,587.60 and 20,006.15 is: 30,013.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,381.79 : 96,587.60 = 20,006.15 : x
  2. Step 2: Convert to fraction form
    64,381.79/96,587.60 = 20,006.15/x
  3. Step 3: Cross multiply
    64,381.79x = 96,587.60 × 20,006.15
  4. Step 4: Simplify right side
    64,381.79x = 1,932,345,430.77
  5. Step 5: Solve for x
    x = 1,932,345,430.77/64,381.79
  6. Step 6: Final answer
    x = 30,013.85

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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.