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Finding the Fourth Proportional to 150,641.95, 207,884.07 and 86,978.38

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Solution

The fourth proportional to 150,641.95, 207,884.07 and 86,978.38 is: 120,029.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,641.95 : 207,884.07 = 86,978.38 : x
  2. Step 2: Convert to fraction form
    150,641.95/207,884.07 = 86,978.38/x
  3. Step 3: Cross multiply
    150,641.95x = 207,884.07 × 86,978.38
  4. Step 4: Simplify right side
    150,641.95x = 18,081,419,636.41
  5. Step 5: Solve for x
    x = 18,081,419,636.41/150,641.95
  6. Step 6: Final answer
    x = 120,029.11

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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.