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Finding the Fourth Proportional to 71,928.32, 99,264.45 and 40,097.45

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Solution

The fourth proportional to 71,928.32, 99,264.45 and 40,097.45 is: 55,336.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,928.32 : 99,264.45 = 40,097.45 : x
  2. Step 2: Convert to fraction form
    71,928.32/99,264.45 = 40,097.45/x
  3. Step 3: Cross multiply
    71,928.32x = 99,264.45 × 40,097.45
  4. Step 4: Simplify right side
    71,928.32x = 3,980,251,320.65
  5. Step 5: Solve for x
    x = 3,980,251,320.65/71,928.32
  6. Step 6: Final answer
    x = 55,336.36

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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.