Home / 121,426.20-182,139.30-77,139.45

Finding the Fourth Proportional to 121,426.20, 182,139.30 and 77,139.45

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Solution

The fourth proportional to 121,426.20, 182,139.30 and 77,139.45 is: 115,709.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,426.20 : 182,139.30 = 77,139.45 : x
  2. Step 2: Convert to fraction form
    121,426.20/182,139.30 = 77,139.45/x
  3. Step 3: Cross multiply
    121,426.20x = 182,139.30 × 77,139.45
  4. Step 4: Simplify right side
    121,426.20x = 14,050,125,425.39
  5. Step 5: Solve for x
    x = 14,050,125,425.39/121,426.20
  6. Step 6: Final answer
    x = 115,709.18

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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.