Home / 121,715.20-182,572.80-84,390.40

Finding the Fourth Proportional to 121,715.20, 182,572.80 and 84,390.40

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Solution

The fourth proportional to 121,715.20, 182,572.80 and 84,390.40 is: 126,585.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,715.20 : 182,572.80 = 84,390.40 : x
  2. Step 2: Convert to fraction form
    121,715.20/182,572.80 = 84,390.40/x
  3. Step 3: Cross multiply
    121,715.20x = 182,572.80 × 84,390.40
  4. Step 4: Simplify right side
    121,715.20x = 15,407,391,621.12
  5. Step 5: Solve for x
    x = 15,407,391,621.12/121,715.20
  6. Step 6: Final answer
    x = 126,585.60

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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.