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Finding the Fourth Proportional to 71,809.52, 99,094.92 and 39,977.72

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Solution

The fourth proportional to 71,809.52, 99,094.92 and 39,977.72 is: 55,168.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,809.52 : 99,094.92 = 39,977.72 : x
  2. Step 2: Convert to fraction form
    71,809.52/99,094.92 = 39,977.72/x
  3. Step 3: Cross multiply
    71,809.52x = 99,094.92 × 39,977.72
  4. Step 4: Simplify right side
    71,809.52x = 3,961,588,965.18
  5. Step 5: Solve for x
    x = 3,961,588,965.18/71,809.52
  6. Step 6: Final answer
    x = 55,168.02

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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.