Home / 72,789.60-100,449-40,957.86

Finding the Fourth Proportional to 72,789.60, 100,449 and 40,957.86

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Solution

The fourth proportional to 72,789.60, 100,449 and 40,957.86 is: 56,521.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,789.60 : 100,449 = 40,957.86 : x
  2. Step 2: Convert to fraction form
    72,789.60/100,449 = 40,957.86/x
  3. Step 3: Cross multiply
    72,789.60x = 100,449 × 40,957.86
  4. Step 4: Simplify right side
    72,789.60x = 4,114,176,079.14
  5. Step 5: Solve for x
    x = 4,114,176,079.14/72,789.60
  6. Step 6: Final answer
    x = 56,521.48

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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.