Home / 87,920.61-121,330.47-47,634.65

Finding the Fourth Proportional to 87,920.61, 121,330.47 and 47,634.65

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Solution

The fourth proportional to 87,920.61, 121,330.47 and 47,634.65 is: 65,735.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,920.61 : 121,330.47 = 47,634.65 : x
  2. Step 2: Convert to fraction form
    87,920.61/121,330.47 = 47,634.65/x
  3. Step 3: Cross multiply
    87,920.61x = 121,330.47 × 47,634.65
  4. Step 4: Simplify right side
    87,920.61x = 5,779,534,472.79
  5. Step 5: Solve for x
    x = 5,779,534,472.79/87,920.61
  6. Step 6: Final answer
    x = 65,735.83

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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.