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Finding the Fourth Proportional to 66,396.80, 99,613.65 and 28,960.13

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Solution

The fourth proportional to 66,396.80, 99,613.65 and 28,960.13 is: 43,448.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,396.80 : 99,613.65 = 28,960.13 : x
  2. Step 2: Convert to fraction form
    66,396.80/99,613.65 = 28,960.13/x
  3. Step 3: Cross multiply
    66,396.80x = 99,613.65 × 28,960.13
  4. Step 4: Simplify right side
    66,396.80x = 2,884,824,253.77
  5. Step 5: Solve for x
    x = 2,884,824,253.77/66,396.80
  6. Step 6: Final answer
    x = 43,448.24

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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.