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Finding the Fourth Proportional to 76,909.52, 115,156.60 and 39,895.76

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Solution

The fourth proportional to 76,909.52, 115,156.60 and 39,895.76 is: 59,735.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,909.52 : 115,156.60 = 39,895.76 : x
  2. Step 2: Convert to fraction form
    76,909.52/115,156.60 = 39,895.76/x
  3. Step 3: Cross multiply
    76,909.52x = 115,156.60 × 39,895.76
  4. Step 4: Simplify right side
    76,909.52x = 4,594,260,076.02
  5. Step 5: Solve for x
    x = 4,594,260,076.02/76,909.52
  6. Step 6: Final answer
    x = 59,735.91

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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.