Home / 87,931.65-121,346.25-47,645.73

Finding the Fourth Proportional to 87,931.65, 121,346.25 and 47,645.73

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Solution

The fourth proportional to 87,931.65, 121,346.25 and 47,645.73 is: 65,751.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,931.65 : 121,346.25 = 47,645.73 : x
  2. Step 2: Convert to fraction form
    87,931.65/121,346.25 = 47,645.73/x
  3. Step 3: Cross multiply
    87,931.65x = 121,346.25 × 47,645.73
  4. Step 4: Simplify right side
    87,931.65x = 5,781,630,664.01
  5. Step 5: Solve for x
    x = 5,781,630,664.01/87,931.65
  6. Step 6: Final answer
    x = 65,751.42

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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.