Home / 280,565.13-420,906.81-91,010.70

Finding the Fourth Proportional to 280,565.13, 420,906.81 and 91,010.70

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Solution

The fourth proportional to 280,565.13, 420,906.81 and 91,010.70 is: 136,535.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,565.13 : 420,906.81 = 91,010.70 : x
  2. Step 2: Convert to fraction form
    280,565.13/420,906.81 = 91,010.70/x
  3. Step 3: Cross multiply
    280,565.13x = 420,906.81 × 91,010.70
  4. Step 4: Simplify right side
    280,565.13x = 38,307,023,412.87
  5. Step 5: Solve for x
    x = 38,307,023,412.87/280,565.13
  6. Step 6: Final answer
    x = 136,535.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.