Home / 100,115.49-138,190.14-57,702.27

Finding the Fourth Proportional to 100,115.49, 138,190.14 and 57,702.27

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Solution

The fourth proportional to 100,115.49, 138,190.14 and 57,702.27 is: 79,646.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,115.49 : 138,190.14 = 57,702.27 : x
  2. Step 2: Convert to fraction form
    100,115.49/138,190.14 = 57,702.27/x
  3. Step 3: Cross multiply
    100,115.49x = 138,190.14 × 57,702.27
  4. Step 4: Simplify right side
    100,115.49x = 7,973,884,769.62
  5. Step 5: Solve for x
    x = 7,973,884,769.62/100,115.49
  6. Step 6: Final answer
    x = 79,646.86

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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.