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Finding the Fourth Proportional to 325,356.60, 487,989.90 and 100,871.40

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Solution

The fourth proportional to 325,356.60, 487,989.90 and 100,871.40 is: 151,293.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,356.60 : 487,989.90 = 100,871.40 : x
  2. Step 2: Convert to fraction form
    325,356.60/487,989.90 = 100,871.40/x
  3. Step 3: Cross multiply
    325,356.60x = 487,989.90 × 100,871.40
  4. Step 4: Simplify right side
    325,356.60x = 49,224,224,398.86
  5. Step 5: Solve for x
    x = 49,224,224,398.86/325,356.60
  6. Step 6: Final answer
    x = 151,293.15

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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.