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Finding the Fourth Proportional to 100,706.01, 138,975.99 and 57,689.27

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Solution

The fourth proportional to 100,706.01, 138,975.99 and 57,689.27 is: 79,612.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,706.01 : 138,975.99 = 57,689.27 : x
  2. Step 2: Convert to fraction form
    100,706.01/138,975.99 = 57,689.27/x
  3. Step 3: Cross multiply
    100,706.01x = 138,975.99 × 57,689.27
  4. Step 4: Simplify right side
    100,706.01x = 8,017,422,715.75
  5. Step 5: Solve for x
    x = 8,017,422,715.75/100,706.01
  6. Step 6: Final answer
    x = 79,612.16

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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.