Home / 121,148.10-181,722.15-74,427.30

Finding the Fourth Proportional to 121,148.10, 181,722.15 and 74,427.30

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Solution

The fourth proportional to 121,148.10, 181,722.15 and 74,427.30 is: 111,640.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,148.10 : 181,722.15 = 74,427.30 : x
  2. Step 2: Convert to fraction form
    121,148.10/181,722.15 = 74,427.30/x
  3. Step 3: Cross multiply
    121,148.10x = 181,722.15 × 74,427.30
  4. Step 4: Simplify right side
    121,148.10x = 13,525,088,974.70
  5. Step 5: Solve for x
    x = 13,525,088,974.70/121,148.10
  6. Step 6: Final answer
    x = 111,640.95

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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.