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Finding the Fourth Proportional to 71,627.88, 98,814.68 and 47,731.28

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Solution

The fourth proportional to 71,627.88, 98,814.68 and 47,731.28 is: 65,847.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,627.88 : 98,814.68 = 47,731.28 : x
  2. Step 2: Convert to fraction form
    71,627.88/98,814.68 = 47,731.28/x
  3. Step 3: Cross multiply
    71,627.88x = 98,814.68 × 47,731.28
  4. Step 4: Simplify right side
    71,627.88x = 4,716,551,159.19
  5. Step 5: Solve for x
    x = 4,716,551,159.19/71,627.88
  6. Step 6: Final answer
    x = 65,847.98

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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.