Home / 72,565.16-100,129.04-40,727.91

Finding the Fourth Proportional to 72,565.16, 100,129.04 and 40,727.91

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Solution

The fourth proportional to 72,565.16, 100,129.04 and 40,727.91 is: 56,198.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,565.16 : 100,129.04 = 40,727.91 : x
  2. Step 2: Convert to fraction form
    72,565.16/100,129.04 = 40,727.91/x
  3. Step 3: Cross multiply
    72,565.16x = 100,129.04 × 40,727.91
  4. Step 4: Simplify right side
    72,565.16x = 4,078,046,325.87
  5. Step 5: Solve for x
    x = 4,078,046,325.87/72,565.16
  6. Step 6: Final answer
    x = 56,198.40

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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.