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Finding the Fourth Proportional to 91,398.88, 126,101.76 and 51,107.20

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Solution

The fourth proportional to 91,398.88, 126,101.76 and 51,107.20 is: 70,511.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,398.88 : 126,101.76 = 51,107.20 : x
  2. Step 2: Convert to fraction form
    91,398.88/126,101.76 = 51,107.20/x
  3. Step 3: Cross multiply
    91,398.88x = 126,101.76 × 51,107.20
  4. Step 4: Simplify right side
    91,398.88x = 6,444,707,868.67
  5. Step 5: Solve for x
    x = 6,444,707,868.67/91,398.88
  6. Step 6: Final answer
    x = 70,511.89

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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.