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Finding the Fourth Proportional to 121,243.92, 181,866.23 and 42,358.15

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Solution

The fourth proportional to 121,243.92, 181,866.23 and 42,358.15 is: 63,537.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,243.92 : 181,866.23 = 42,358.15 : x
  2. Step 2: Convert to fraction form
    121,243.92/181,866.23 = 42,358.15/x
  3. Step 3: Cross multiply
    121,243.92x = 181,866.23 × 42,358.15
  4. Step 4: Simplify right side
    121,243.92x = 7,703,517,050.27
  5. Step 5: Solve for x
    x = 7,703,517,050.27/121,243.92
  6. Step 6: Final answer
    x = 63,537.35

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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.