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Finding the Fourth Proportional to 87,390.71, 120,595.86 and 53,387.31

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Solution

The fourth proportional to 87,390.71, 120,595.86 and 53,387.31 is: 73,672.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,390.71 : 120,595.86 = 53,387.31 : x
  2. Step 2: Convert to fraction form
    87,390.71/120,595.86 = 53,387.31/x
  3. Step 3: Cross multiply
    87,390.71x = 120,595.86 × 53,387.31
  4. Step 4: Simplify right side
    87,390.71x = 6,438,288,562.54
  5. Step 5: Solve for x
    x = 6,438,288,562.54/87,390.71
  6. Step 6: Final answer
    x = 73,672.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.