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Finding the Fourth Proportional to 126,477.72, 189,825.66 and 70,373.88

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Solution

The fourth proportional to 126,477.72, 189,825.66 and 70,373.88 is: 105,621.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,477.72 : 189,825.66 = 70,373.88 : x
  2. Step 2: Convert to fraction form
    126,477.72/189,825.66 = 70,373.88/x
  3. Step 3: Cross multiply
    126,477.72x = 189,825.66 × 70,373.88
  4. Step 4: Simplify right side
    126,477.72x = 13,358,768,217.76
  5. Step 5: Solve for x
    x = 13,358,768,217.76/126,477.72
  6. Step 6: Final answer
    x = 105,621.51

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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.