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Finding the Fourth Proportional to 156,438, 234,664.29 and 45,630

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Solution

The fourth proportional to 156,438, 234,664.29 and 45,630 is: 68,447.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,438 : 234,664.29 = 45,630 : x
  2. Step 2: Convert to fraction form
    156,438/234,664.29 = 45,630/x
  3. Step 3: Cross multiply
    156,438x = 234,664.29 × 45,630
  4. Step 4: Simplify right side
    156,438x = 10,707,731,552.70
  5. Step 5: Solve for x
    x = 10,707,731,552.70/156,438
  6. Step 6: Final answer
    x = 68,447.13

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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.