Home / 121,402.10-182,103.15-74,681.30

Finding the Fourth Proportional to 121,402.10, 182,103.15 and 74,681.30

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Solution

The fourth proportional to 121,402.10, 182,103.15 and 74,681.30 is: 112,021.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,402.10 : 182,103.15 = 74,681.30 : x
  2. Step 2: Convert to fraction form
    121,402.10/182,103.15 = 74,681.30/x
  3. Step 3: Cross multiply
    121,402.10x = 182,103.15 × 74,681.30
  4. Step 4: Simplify right side
    121,402.10x = 13,599,699,976.10
  5. Step 5: Solve for x
    x = 13,599,699,976.10/121,402.10
  6. Step 6: Final answer
    x = 112,021.95

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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.