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Finding the Fourth Proportional to 71,799, 99,165.60 and 47,884.20

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Solution

The fourth proportional to 71,799, 99,165.60 and 47,884.20 is: 66,135.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,799 : 99,165.60 = 47,884.20 : x
  2. Step 2: Convert to fraction form
    71,799/99,165.60 = 47,884.20/x
  3. Step 3: Cross multiply
    71,799x = 99,165.60 × 47,884.20
  4. Step 4: Simplify right side
    71,799x = 4,748,465,423.52
  5. Step 5: Solve for x
    x = 4,748,465,423.52/71,799
  6. Step 6: Final answer
    x = 66,135.54

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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.