Home / 126,421.30-189,658.35-42,178.10

Finding the Fourth Proportional to 126,421.30, 189,658.35 and 42,178.10

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Solution

The fourth proportional to 126,421.30, 189,658.35 and 42,178.10 is: 63,275.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,421.30 : 189,658.35 = 42,178.10 : x
  2. Step 2: Convert to fraction form
    126,421.30/189,658.35 = 42,178.10/x
  3. Step 3: Cross multiply
    126,421.30x = 189,658.35 × 42,178.10
  4. Step 4: Simplify right side
    126,421.30x = 7,999,428,852.14
  5. Step 5: Solve for x
    x = 7,999,428,852.14/126,421.30
  6. Step 6: Final answer
    x = 63,275.96

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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.