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Finding the Fourth Proportional to 121,242.30, 181,863.80 and 42,356.53

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Solution

The fourth proportional to 121,242.30, 181,863.80 and 42,356.53 is: 63,534.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,242.30 : 181,863.80 = 42,356.53 : x
  2. Step 2: Convert to fraction form
    121,242.30/181,863.80 = 42,356.53/x
  3. Step 3: Cross multiply
    121,242.30x = 181,863.80 × 42,356.53
  4. Step 4: Simplify right side
    121,242.30x = 7,703,118,379.51
  5. Step 5: Solve for x
    x = 7,703,118,379.51/121,242.30
  6. Step 6: Final answer
    x = 63,534.91

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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.