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Finding the Fourth Proportional to 99,057.42, 148,623.12 and 39,909.87

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Solution

The fourth proportional to 99,057.42, 148,623.12 and 39,909.87 is: 59,879.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,057.42 : 148,623.12 = 39,909.87 : x
  2. Step 2: Convert to fraction form
    99,057.42/148,623.12 = 39,909.87/x
  3. Step 3: Cross multiply
    99,057.42x = 148,623.12 × 39,909.87
  4. Step 4: Simplify right side
    99,057.42x = 5,931,529,398.19
  5. Step 5: Solve for x
    x = 5,931,529,398.19/99,057.42
  6. Step 6: Final answer
    x = 59,879.71

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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.