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Finding the Fourth Proportional to 121,151.20, 181,726.80 and 83,826.40

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Solution

The fourth proportional to 121,151.20, 181,726.80 and 83,826.40 is: 125,739.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,151.20 : 181,726.80 = 83,826.40 : x
  2. Step 2: Convert to fraction form
    121,151.20/181,726.80 = 83,826.40/x
  3. Step 3: Cross multiply
    121,151.20x = 181,726.80 × 83,826.40
  4. Step 4: Simplify right side
    121,151.20x = 15,233,503,427.52
  5. Step 5: Solve for x
    x = 15,233,503,427.52/121,151.20
  6. Step 6: Final answer
    x = 125,739.60

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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.