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Finding the Fourth Proportional to 121,290.30, 181,935.45 and 73,856.70

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Solution

The fourth proportional to 121,290.30, 181,935.45 and 73,856.70 is: 110,785.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,290.30 : 181,935.45 = 73,856.70 : x
  2. Step 2: Convert to fraction form
    121,290.30/181,935.45 = 73,856.70/x
  3. Step 3: Cross multiply
    121,290.30x = 181,935.45 × 73,856.70
  4. Step 4: Simplify right side
    121,290.30x = 13,437,151,950.02
  5. Step 5: Solve for x
    x = 13,437,151,950.02/121,290.30
  6. Step 6: Final answer
    x = 110,785.05

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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.