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Finding the Fourth Proportional to 83,510.50, 115,180.88 and 71,888.40

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Solution

The fourth proportional to 83,510.50, 115,180.88 and 71,888.40 is: 99,151.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,510.50 : 115,180.88 = 71,888.40 : x
  2. Step 2: Convert to fraction form
    83,510.50/115,180.88 = 71,888.40/x
  3. Step 3: Cross multiply
    83,510.50x = 115,180.88 × 71,888.40
  4. Step 4: Simplify right side
    83,510.50x = 8,280,169,173.79
  5. Step 5: Solve for x
    x = 8,280,169,173.79/83,510.50
  6. Step 6: Final answer
    x = 99,151.23

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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.