Home / 121,570.30-182,246.10-77,174.20

Finding the Fourth Proportional to 121,570.30, 182,246.10 and 77,174.20

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Solution

The fourth proportional to 121,570.30, 182,246.10 and 77,174.20 is: 115,691.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,570.30 : 182,246.10 = 77,174.20 : x
  2. Step 2: Convert to fraction form
    121,570.30/182,246.10 = 77,174.20/x
  3. Step 3: Cross multiply
    121,570.30x = 182,246.10 × 77,174.20
  4. Step 4: Simplify right side
    121,570.30x = 14,064,696,970.62
  5. Step 5: Solve for x
    x = 14,064,696,970.62/121,570.30
  6. Step 6: Final answer
    x = 115,691.88

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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.