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Finding the Fourth Proportional to 171,126, 256,792.68 and 72,630

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Solution

The fourth proportional to 171,126, 256,792.68 and 72,630 is: 108,989.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,126 : 256,792.68 = 72,630 : x
  2. Step 2: Convert to fraction form
    171,126/256,792.68 = 72,630/x
  3. Step 3: Cross multiply
    171,126x = 256,792.68 × 72,630
  4. Step 4: Simplify right side
    171,126x = 18,650,852,348.40
  5. Step 5: Solve for x
    x = 18,650,852,348.40/171,126
  6. Step 6: Final answer
    x = 108,989.00

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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.