Home / 121,156.56-181,721.88-42,272.28

Finding the Fourth Proportional to 121,156.56, 181,721.88 and 42,272.28

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Solution

The fourth proportional to 121,156.56, 181,721.88 and 42,272.28 is: 63,403.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,156.56 : 181,721.88 = 42,272.28 : x
  2. Step 2: Convert to fraction form
    121,156.56/181,721.88 = 42,272.28/x
  3. Step 3: Cross multiply
    121,156.56x = 181,721.88 × 42,272.28
  4. Step 4: Simplify right side
    121,156.56x = 7,681,798,193.49
  5. Step 5: Solve for x
    x = 7,681,798,193.49/121,156.56
  6. Step 6: Final answer
    x = 63,403.90

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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.