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Finding the Fourth Proportional to 100,817.51, 139,121.01 and 59,979.38

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Solution

The fourth proportional to 100,817.51, 139,121.01 and 59,979.38 is: 82,767.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,817.51 : 139,121.01 = 59,979.38 : x
  2. Step 2: Convert to fraction form
    100,817.51/139,121.01 = 59,979.38/x
  3. Step 3: Cross multiply
    100,817.51x = 139,121.01 × 59,979.38
  4. Step 4: Simplify right side
    100,817.51x = 8,344,391,229.17
  5. Step 5: Solve for x
    x = 8,344,391,229.17/100,817.51
  6. Step 6: Final answer
    x = 82,767.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.