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Finding the Fourth Proportional to 215,695.40, 323,543.10 and 57,939.80

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Solution

The fourth proportional to 215,695.40, 323,543.10 and 57,939.80 is: 86,909.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,695.40 : 323,543.10 = 57,939.80 : x
  2. Step 2: Convert to fraction form
    215,695.40/323,543.10 = 57,939.80/x
  3. Step 3: Cross multiply
    215,695.40x = 323,543.10 × 57,939.80
  4. Step 4: Simplify right side
    215,695.40x = 18,746,022,505.38
  5. Step 5: Solve for x
    x = 18,746,022,505.38/215,695.40
  6. Step 6: Final answer
    x = 86,909.70

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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.