Home / 121,156.40-181,669.80-42,273.20

Finding the Fourth Proportional to 121,156.40, 181,669.80 and 42,273.20

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Solution

The fourth proportional to 121,156.40, 181,669.80 and 42,273.20 is: 63,387.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,156.40 : 181,669.80 = 42,273.20 : x
  2. Step 2: Convert to fraction form
    121,156.40/181,669.80 = 42,273.20/x
  3. Step 3: Cross multiply
    121,156.40x = 181,669.80 × 42,273.20
  4. Step 4: Simplify right side
    121,156.40x = 7,679,763,789.36
  5. Step 5: Solve for x
    x = 7,679,763,789.36/121,156.40
  6. Step 6: Final answer
    x = 63,387.19

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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.