Home / 137,079.20-205,618.80-115,306.40

Finding the Fourth Proportional to 137,079.20, 205,618.80 and 115,306.40

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Solution

The fourth proportional to 137,079.20, 205,618.80 and 115,306.40 is: 172,959.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,079.20 : 205,618.80 = 115,306.40 : x
  2. Step 2: Convert to fraction form
    137,079.20/205,618.80 = 115,306.40/x
  3. Step 3: Cross multiply
    137,079.20x = 205,618.80 × 115,306.40
  4. Step 4: Simplify right side
    137,079.20x = 23,709,163,600.32
  5. Step 5: Solve for x
    x = 23,709,163,600.32/137,079.20
  6. Step 6: Final answer
    x = 172,959.60

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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.