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Finding the Fourth Proportional to 150,639.13, 207,900.44 and 86,976.78

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Solution

The fourth proportional to 150,639.13, 207,900.44 and 86,976.78 is: 120,038.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,639.13 : 207,900.44 = 86,976.78 : x
  2. Step 2: Convert to fraction form
    150,639.13/207,900.44 = 86,976.78/x
  3. Step 3: Cross multiply
    150,639.13x = 207,900.44 × 86,976.78
  4. Step 4: Simplify right side
    150,639.13x = 18,082,510,831.78
  5. Step 5: Solve for x
    x = 18,082,510,831.78/150,639.13
  6. Step 6: Final answer
    x = 120,038.60

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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.