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Finding the Fourth Proportional to 121,347.20, 182,020.80 and 91,822.70

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Solution

The fourth proportional to 121,347.20, 182,020.80 and 91,822.70 is: 137,734.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,347.20 : 182,020.80 = 91,822.70 : x
  2. Step 2: Convert to fraction form
    121,347.20/182,020.80 = 91,822.70/x
  3. Step 3: Cross multiply
    121,347.20x = 182,020.80 × 91,822.70
  4. Step 4: Simplify right side
    121,347.20x = 16,713,641,312.16
  5. Step 5: Solve for x
    x = 16,713,641,312.16/121,347.20
  6. Step 6: Final answer
    x = 137,734.05

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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.