Home / 121,028.31-181,543.28-42,142.28

Finding the Fourth Proportional to 121,028.31, 181,543.28 and 42,142.28

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Solution

The fourth proportional to 121,028.31, 181,543.28 and 42,142.28 is: 63,213.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,028.31 : 181,543.28 = 42,142.28 : x
  2. Step 2: Convert to fraction form
    121,028.31/181,543.28 = 42,142.28/x
  3. Step 3: Cross multiply
    121,028.31x = 181,543.28 × 42,142.28
  4. Step 4: Simplify right side
    121,028.31x = 7,650,646,619.45
  5. Step 5: Solve for x
    x = 7,650,646,619.45/121,028.31
  6. Step 6: Final answer
    x = 63,213.69

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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.