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Finding the Fourth Proportional to 128,111.70, 192,167.55 and 45,005.70

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Solution

The fourth proportional to 128,111.70, 192,167.55 and 45,005.70 is: 67,508.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,111.70 : 192,167.55 = 45,005.70 : x
  2. Step 2: Convert to fraction form
    128,111.70/192,167.55 = 45,005.70/x
  3. Step 3: Cross multiply
    128,111.70x = 192,167.55 × 45,005.70
  4. Step 4: Simplify right side
    128,111.70x = 8,648,635,105.04
  5. Step 5: Solve for x
    x = 8,648,635,105.04/128,111.70
  6. Step 6: Final answer
    x = 67,508.55

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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.