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Finding the Fourth Proportional to 71,536.65, 98,729.33 and 39,715.80

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Solution

The fourth proportional to 71,536.65, 98,729.33 and 39,715.80 is: 54,812.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,536.65 : 98,729.33 = 39,715.80 : x
  2. Step 2: Convert to fraction form
    71,536.65/98,729.33 = 39,715.80/x
  3. Step 3: Cross multiply
    71,536.65x = 98,729.33 × 39,715.80
  4. Step 4: Simplify right side
    71,536.65x = 3,921,114,125.84
  5. Step 5: Solve for x
    x = 3,921,114,125.84/71,536.65
  6. Step 6: Final answer
    x = 54,812.66

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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.