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Finding the Fourth Proportional to 260,139.80, 390,209.70 and 73,151.30

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Solution

The fourth proportional to 260,139.80, 390,209.70 and 73,151.30 is: 109,726.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,139.80 : 390,209.70 = 73,151.30 : x
  2. Step 2: Convert to fraction form
    260,139.80/390,209.70 = 73,151.30/x
  3. Step 3: Cross multiply
    260,139.80x = 390,209.70 × 73,151.30
  4. Step 4: Simplify right side
    260,139.80x = 28,544,346,827.61
  5. Step 5: Solve for x
    x = 28,544,346,827.61/260,139.80
  6. Step 6: Final answer
    x = 109,726.95

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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.