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Finding the Fourth Proportional to 152,199.78, 209,988.09 and 91,788.90

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Solution

The fourth proportional to 152,199.78, 209,988.09 and 91,788.90 is: 126,639.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,199.78 : 209,988.09 = 91,788.90 : x
  2. Step 2: Convert to fraction form
    152,199.78/209,988.09 = 91,788.90/x
  3. Step 3: Cross multiply
    152,199.78x = 209,988.09 × 91,788.90
  4. Step 4: Simplify right side
    152,199.78x = 19,274,575,794.20
  5. Step 5: Solve for x
    x = 19,274,575,794.20/152,199.78
  6. Step 6: Final answer
    x = 126,639.97

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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.