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Finding the Fourth Proportional to 123,877.26, 170,954.76 and 72,880.92

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Solution

The fourth proportional to 123,877.26, 170,954.76 and 72,880.92 is: 100,578.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,877.26 : 170,954.76 = 72,880.92 : x
  2. Step 2: Convert to fraction form
    123,877.26/170,954.76 = 72,880.92/x
  3. Step 3: Cross multiply
    123,877.26x = 170,954.76 × 72,880.92
  4. Step 4: Simplify right side
    123,877.26x = 12,459,340,187.18
  5. Step 5: Solve for x
    x = 12,459,340,187.18/123,877.26
  6. Step 6: Final answer
    x = 100,578.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.