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Finding the Fourth Proportional to 208,860.60, 313,290.90 and 138,001.80

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Solution

The fourth proportional to 208,860.60, 313,290.90 and 138,001.80 is: 207,002.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,860.60 : 313,290.90 = 138,001.80 : x
  2. Step 2: Convert to fraction form
    208,860.60/313,290.90 = 138,001.80/x
  3. Step 3: Cross multiply
    208,860.60x = 313,290.90 × 138,001.80
  4. Step 4: Simplify right side
    208,860.60x = 43,234,708,123.62
  5. Step 5: Solve for x
    x = 43,234,708,123.62/208,860.60
  6. Step 6: Final answer
    x = 207,002.70

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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.