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Finding the Fourth Proportional to 85,979.70, 128,860.20 and 41,510.70

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Solution

The fourth proportional to 85,979.70, 128,860.20 and 41,510.70 is: 62,213.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,979.70 : 128,860.20 = 41,510.70 : x
  2. Step 2: Convert to fraction form
    85,979.70/128,860.20 = 41,510.70/x
  3. Step 3: Cross multiply
    85,979.70x = 128,860.20 × 41,510.70
  4. Step 4: Simplify right side
    85,979.70x = 5,349,077,104.14
  5. Step 5: Solve for x
    x = 5,349,077,104.14/85,979.70
  6. Step 6: Final answer
    x = 62,213.26

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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.