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Finding the Fourth Proportional to 543,387.70, 815,081.55 and 144,090.10

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Solution

The fourth proportional to 543,387.70, 815,081.55 and 144,090.10 is: 216,135.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,387.70 : 815,081.55 = 144,090.10 : x
  2. Step 2: Convert to fraction form
    543,387.70/815,081.55 = 144,090.10/x
  3. Step 3: Cross multiply
    543,387.70x = 815,081.55 × 144,090.10
  4. Step 4: Simplify right side
    543,387.70x = 117,445,182,047.66
  5. Step 5: Solve for x
    x = 117,445,182,047.66/543,387.70
  6. Step 6: Final answer
    x = 216,135.15

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.