Home / 121,437.20-181,937.10-74,635.40

Finding the Fourth Proportional to 121,437.20, 181,937.10 and 74,635.40

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Solution

The fourth proportional to 121,437.20, 181,937.10 and 74,635.40 is: 111,818.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,437.20 : 181,937.10 = 74,635.40 : x
  2. Step 2: Convert to fraction form
    121,437.20/181,937.10 = 74,635.40/x
  3. Step 3: Cross multiply
    121,437.20x = 181,937.10 × 74,635.40
  4. Step 4: Simplify right side
    121,437.20x = 13,578,948,233.34
  5. Step 5: Solve for x
    x = 13,578,948,233.34/121,437.20
  6. Step 6: Final answer
    x = 111,818.69

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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.