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Finding the Fourth Proportional to 76,875.52, 115,105.60 and 39,861.76

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Solution

The fourth proportional to 76,875.52, 115,105.60 and 39,861.76 is: 59,684.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,875.52 : 115,105.60 = 39,861.76 : x
  2. Step 2: Convert to fraction form
    76,875.52/115,105.60 = 39,861.76/x
  3. Step 3: Cross multiply
    76,875.52x = 115,105.60 × 39,861.76
  4. Step 4: Simplify right side
    76,875.52x = 4,588,311,801.86
  5. Step 5: Solve for x
    x = 4,588,311,801.86/76,875.52
  6. Step 6: Final answer
    x = 59,684.95

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1.5x scale

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.