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Finding the Fourth Proportional to 100,595.12, 138,769.21 and 68,331.40

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Solution

The fourth proportional to 100,595.12, 138,769.21 and 68,331.40 is: 94,261.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,595.12 : 138,769.21 = 68,331.40 : x
  2. Step 2: Convert to fraction form
    100,595.12/138,769.21 = 68,331.40/x
  3. Step 3: Cross multiply
    100,595.12x = 138,769.21 × 68,331.40
  4. Step 4: Simplify right side
    100,595.12x = 9,482,294,396.19
  5. Step 5: Solve for x
    x = 9,482,294,396.19/100,595.12
  6. Step 6: Final answer
    x = 94,261.97

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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.