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Finding the Fourth Proportional to 121,245.96, 181,898.10 and 38,139.96

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Solution

The fourth proportional to 121,245.96, 181,898.10 and 38,139.96 is: 57,219.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,245.96 : 181,898.10 = 38,139.96 : x
  2. Step 2: Convert to fraction form
    121,245.96/181,898.10 = 38,139.96/x
  3. Step 3: Cross multiply
    121,245.96x = 181,898.10 × 38,139.96
  4. Step 4: Simplify right side
    121,245.96x = 6,937,586,258.08
  5. Step 5: Solve for x
    x = 6,937,586,258.08/121,245.96
  6. Step 6: Final answer
    x = 57,219.11

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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.