Home / 121,257.48-181,939.14-42,428.28

Finding the Fourth Proportional to 121,257.48, 181,939.14 and 42,428.28

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Solution

The fourth proportional to 121,257.48, 181,939.14 and 42,428.28 is: 63,660.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,257.48 : 181,939.14 = 42,428.28 : x
  2. Step 2: Convert to fraction form
    121,257.48/181,939.14 = 42,428.28/x
  3. Step 3: Cross multiply
    121,257.48x = 181,939.14 × 42,428.28
  4. Step 4: Simplify right side
    121,257.48x = 7,719,364,774.88
  5. Step 5: Solve for x
    x = 7,719,364,774.88/121,257.48
  6. Step 6: Final answer
    x = 63,660.94

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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.