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Finding the Fourth Proportional to 128,248.60, 192,363.78 and 39,492.85

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Solution

The fourth proportional to 128,248.60, 192,363.78 and 39,492.85 is: 59,236.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,248.60 : 192,363.78 = 39,492.85 : x
  2. Step 2: Convert to fraction form
    128,248.60/192,363.78 = 39,492.85/x
  3. Step 3: Cross multiply
    128,248.60x = 192,363.78 × 39,492.85
  4. Step 4: Simplify right side
    128,248.60x = 7,596,993,908.97
  5. Step 5: Solve for x
    x = 7,596,993,908.97/128,248.60
  6. Step 6: Final answer
    x = 59,236.47

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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.