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Finding the Fourth Proportional to 85,412.80, 128,155.65 and 41,016.70

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Solution

The fourth proportional to 85,412.80, 128,155.65 and 41,016.70 is: 61,542.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,412.80 : 128,155.65 = 41,016.70 : x
  2. Step 2: Convert to fraction form
    85,412.80/128,155.65 = 41,016.70/x
  3. Step 3: Cross multiply
    85,412.80x = 128,155.65 × 41,016.70
  4. Step 4: Simplify right side
    85,412.80x = 5,256,521,849.36
  5. Step 5: Solve for x
    x = 5,256,521,849.36/85,412.80
  6. Step 6: Final answer
    x = 61,542.55

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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.