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Finding the Fourth Proportional to 126,579, 189,744.30 and 70,446

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Solution

The fourth proportional to 126,579, 189,744.30 and 70,446 is: 105,599.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,579 : 189,744.30 = 70,446 : x
  2. Step 2: Convert to fraction form
    126,579/189,744.30 = 70,446/x
  3. Step 3: Cross multiply
    126,579x = 189,744.30 × 70,446
  4. Step 4: Simplify right side
    126,579x = 13,366,726,957.80
  5. Step 5: Solve for x
    x = 13,366,726,957.80/126,579
  6. Step 6: Final answer
    x = 105,599.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.