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Finding the Fourth Proportional to 64,961.55, 97,424.10 and 20,601.90

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Solution

The fourth proportional to 64,961.55, 97,424.10 and 20,601.90 is: 30,897.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,961.55 : 97,424.10 = 20,601.90 : x
  2. Step 2: Convert to fraction form
    64,961.55/97,424.10 = 20,601.90/x
  3. Step 3: Cross multiply
    64,961.55x = 97,424.10 × 20,601.90
  4. Step 4: Simplify right side
    64,961.55x = 2,007,121,565.79
  5. Step 5: Solve for x
    x = 2,007,121,565.79/64,961.55
  6. Step 6: Final answer
    x = 30,897.07

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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.