Home / 121,310.10-181,965.15-42,432.30

Finding the Fourth Proportional to 121,310.10, 181,965.15 and 42,432.30

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Solution

The fourth proportional to 121,310.10, 181,965.15 and 42,432.30 is: 63,648.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,310.10 : 181,965.15 = 42,432.30 : x
  2. Step 2: Convert to fraction form
    121,310.10/181,965.15 = 42,432.30/x
  3. Step 3: Cross multiply
    121,310.10x = 181,965.15 × 42,432.30
  4. Step 4: Simplify right side
    121,310.10x = 7,721,199,834.35
  5. Step 5: Solve for x
    x = 7,721,199,834.35/121,310.10
  6. Step 6: Final answer
    x = 63,648.45

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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.