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Finding the Fourth Proportional to 76,399.47, 105,394.68 and 45,757.76

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Solution

The fourth proportional to 76,399.47, 105,394.68 and 45,757.76 is: 63,123.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,399.47 : 105,394.68 = 45,757.76 : x
  2. Step 2: Convert to fraction form
    76,399.47/105,394.68 = 45,757.76/x
  3. Step 3: Cross multiply
    76,399.47x = 105,394.68 × 45,757.76
  4. Step 4: Simplify right side
    76,399.47x = 4,822,623,945.74
  5. Step 5: Solve for x
    x = 4,822,623,945.74/76,399.47
  6. Step 6: Final answer
    x = 63,123.79

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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.