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Finding the Fourth Proportional to 71,900.76, 99,221.05 and 40,068.84

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Solution

The fourth proportional to 71,900.76, 99,221.05 and 40,068.84 is: 55,293.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,900.76 : 99,221.05 = 40,068.84 : x
  2. Step 2: Convert to fraction form
    71,900.76/99,221.05 = 40,068.84/x
  3. Step 3: Cross multiply
    71,900.76x = 99,221.05 × 40,068.84
  4. Step 4: Simplify right side
    71,900.76x = 3,975,671,680.63
  5. Step 5: Solve for x
    x = 3,975,671,680.63/71,900.76
  6. Step 6: Final answer
    x = 55,293.88

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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.