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Finding the Fourth Proportional to 76,836.70, 115,298.80 and 61,352.74

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Solution

The fourth proportional to 76,836.70, 115,298.80 and 61,352.74 is: 92,064.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,836.70 : 115,298.80 = 61,352.74 : x
  2. Step 2: Convert to fraction form
    76,836.70/115,298.80 = 61,352.74/x
  3. Step 3: Cross multiply
    76,836.70x = 115,298.80 × 61,352.74
  4. Step 4: Simplify right side
    76,836.70x = 7,073,897,298.71
  5. Step 5: Solve for x
    x = 7,073,897,298.71/76,836.70
  6. Step 6: Final answer
    x = 92,064.04

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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.