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Finding the Fourth Proportional to 138,422.80, 194,316.80 and 138,422.80

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Solution

The fourth proportional to 138,422.80, 194,316.80 and 138,422.80 is: 194,316.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,422.80 : 194,316.80 = 138,422.80 : x
  2. Step 2: Convert to fraction form
    138,422.80/194,316.80 = 138,422.80/x
  3. Step 3: Cross multiply
    138,422.80x = 194,316.80 × 138,422.80
  4. Step 4: Simplify right side
    138,422.80x = 26,897,875,543.04
  5. Step 5: Solve for x
    x = 26,897,875,543.04/138,422.80
  6. Step 6: Final answer
    x = 194,316.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.