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Finding the Fourth Proportional to 421,155.53, 631,545.57 and 121,564.88

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Solution

The fourth proportional to 421,155.53, 631,545.57 and 121,564.88 is: 182,293.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,155.53 : 631,545.57 = 121,564.88 : x
  2. Step 2: Convert to fraction form
    421,155.53/631,545.57 = 121,564.88/x
  3. Step 3: Cross multiply
    421,155.53x = 631,545.57 × 121,564.88
  4. Step 4: Simplify right side
    421,155.53x = 76,773,758,273.85
  5. Step 5: Solve for x
    x = 76,773,758,273.85/421,155.53
  6. Step 6: Final answer
    x = 182,293.13

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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.