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Finding the Fourth Proportional to 145,412.60, 218,118.90 and 82,167.80

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Solution

The fourth proportional to 145,412.60, 218,118.90 and 82,167.80 is: 123,251.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,412.60 : 218,118.90 = 82,167.80 : x
  2. Step 2: Convert to fraction form
    145,412.60/218,118.90 = 82,167.80/x
  3. Step 3: Cross multiply
    145,412.60x = 218,118.90 × 82,167.80
  4. Step 4: Simplify right side
    145,412.60x = 17,922,350,151.42
  5. Step 5: Solve for x
    x = 17,922,350,151.42/145,412.60
  6. Step 6: Final answer
    x = 123,251.70

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1.5x scale

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.