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Finding the Fourth Proportional to 150,641.13, 207,903.21 and 86,978.79

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Solution

The fourth proportional to 150,641.13, 207,903.21 and 86,978.79 is: 120,041.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,641.13 : 207,903.21 = 86,978.79 : x
  2. Step 2: Convert to fraction form
    150,641.13/207,903.21 = 86,978.79/x
  3. Step 3: Cross multiply
    150,641.13x = 207,903.21 × 86,978.79
  4. Step 4: Simplify right side
    150,641.13x = 18,083,169,642.92
  5. Step 5: Solve for x
    x = 18,083,169,642.92/150,641.13
  6. Step 6: Final answer
    x = 120,041.38

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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.