Home / 137,547.18-206,320.77-90,789.12

Finding the Fourth Proportional to 137,547.18, 206,320.77 and 90,789.12

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Solution

The fourth proportional to 137,547.18, 206,320.77 and 90,789.12 is: 136,183.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,547.18 : 206,320.77 = 90,789.12 : x
  2. Step 2: Convert to fraction form
    137,547.18/206,320.77 = 90,789.12/x
  3. Step 3: Cross multiply
    137,547.18x = 206,320.77 × 90,789.12
  4. Step 4: Simplify right side
    137,547.18x = 18,731,681,146.02
  5. Step 5: Solve for x
    x = 18,731,681,146.02/137,547.18
  6. Step 6: Final answer
    x = 136,183.68

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1.5x scale

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.