Home / 72,765.91-100,416-40,934.80

Finding the Fourth Proportional to 72,765.91, 100,416 and 40,934.80

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Solution

The fourth proportional to 72,765.91, 100,416 and 40,934.80 is: 56,489.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,765.91 : 100,416 = 40,934.80 : x
  2. Step 2: Convert to fraction form
    72,765.91/100,416 = 40,934.80/x
  3. Step 3: Cross multiply
    72,765.91x = 100,416 × 40,934.80
  4. Step 4: Simplify right side
    72,765.91x = 4,110,508,876.80
  5. Step 5: Solve for x
    x = 4,110,508,876.80/72,765.91
  6. Step 6: Final answer
    x = 56,489.49

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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.