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Finding the Fourth Proportional to 82,381.80, 123,543.90 and 42,925.80

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Solution

The fourth proportional to 82,381.80, 123,543.90 and 42,925.80 is: 64,373.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,381.80 : 123,543.90 = 42,925.80 : x
  2. Step 2: Convert to fraction form
    82,381.80/123,543.90 = 42,925.80/x
  3. Step 3: Cross multiply
    82,381.80x = 123,543.90 × 42,925.80
  4. Step 4: Simplify right side
    82,381.80x = 5,303,220,742.62
  5. Step 5: Solve for x
    x = 5,303,220,742.62/82,381.80
  6. Step 6: Final answer
    x = 64,373.69

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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.