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Finding the Fourth Proportional to 145,939.70, 218,909.55 and 83,558.90

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Solution

The fourth proportional to 145,939.70, 218,909.55 and 83,558.90 is: 125,338.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,939.70 : 218,909.55 = 83,558.90 : x
  2. Step 2: Convert to fraction form
    145,939.70/218,909.55 = 83,558.90/x
  3. Step 3: Cross multiply
    145,939.70x = 218,909.55 × 83,558.90
  4. Step 4: Simplify right side
    145,939.70x = 18,291,841,197.50
  5. Step 5: Solve for x
    x = 18,291,841,197.50/145,939.70
  6. Step 6: Final answer
    x = 125,338.35

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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.