Home / 121,029.81-181,545.53-42,143.78

Finding the Fourth Proportional to 121,029.81, 181,545.53 and 42,143.78

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Solution

The fourth proportional to 121,029.81, 181,545.53 and 42,143.78 is: 63,215.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,029.81 : 181,545.53 = 42,143.78 : x
  2. Step 2: Convert to fraction form
    121,029.81/181,545.53 = 42,143.78/x
  3. Step 3: Cross multiply
    121,029.81x = 181,545.53 × 42,143.78
  4. Step 4: Simplify right side
    121,029.81x = 7,651,013,757.86
  5. Step 5: Solve for x
    x = 7,651,013,757.86/121,029.81
  6. Step 6: Final answer
    x = 63,215.94

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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.