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Finding the Fourth Proportional to 71,859.09, 99,159.10 and 40,027.30

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Solution

The fourth proportional to 71,859.09, 99,159.10 and 40,027.30 is: 55,234.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,859.09 : 99,159.10 = 40,027.30 : x
  2. Step 2: Convert to fraction form
    71,859.09/99,159.10 = 40,027.30/x
  3. Step 3: Cross multiply
    71,859.09x = 99,159.10 × 40,027.30
  4. Step 4: Simplify right side
    71,859.09x = 3,969,071,043.43
  5. Step 5: Solve for x
    x = 3,969,071,043.43/71,859.09
  6. Step 6: Final answer
    x = 55,234.08

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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.