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Finding the Fourth Proportional to 72,510.88, 100,063.36 and 40,679.04

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Solution

The fourth proportional to 72,510.88, 100,063.36 and 40,679.04 is: 56,136.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,510.88 : 100,063.36 = 40,679.04 : x
  2. Step 2: Convert to fraction form
    72,510.88/100,063.36 = 40,679.04/x
  3. Step 3: Cross multiply
    72,510.88x = 100,063.36 × 40,679.04
  4. Step 4: Simplify right side
    72,510.88x = 4,070,481,423.97
  5. Step 5: Solve for x
    x = 4,070,481,423.97/72,510.88
  6. Step 6: Final answer
    x = 56,136.15

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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.