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Finding the Fourth Proportional to 342,172.15, 513,247.51 and 142,487.53

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Solution

The fourth proportional to 342,172.15, 513,247.51 and 142,487.53 is: 213,726.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,172.15 : 513,247.51 = 142,487.53 : x
  2. Step 2: Convert to fraction form
    342,172.15/513,247.51 = 142,487.53/x
  3. Step 3: Cross multiply
    342,172.15x = 513,247.51 × 142,487.53
  4. Step 4: Simplify right side
    342,172.15x = 73,131,369,978.55
  5. Step 5: Solve for x
    x = 73,131,369,978.55/342,172.15
  6. Step 6: Final answer
    x = 213,726.83

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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.