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Finding the Fourth Proportional to 98,444.20, 147,739.20 and 72,200.20

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Solution

The fourth proportional to 98,444.20, 147,739.20 and 72,200.20 is: 108,353.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,444.20 : 147,739.20 = 72,200.20 : x
  2. Step 2: Convert to fraction form
    98,444.20/147,739.20 = 72,200.20/x
  3. Step 3: Cross multiply
    98,444.20x = 147,739.20 × 72,200.20
  4. Step 4: Simplify right side
    98,444.20x = 10,666,799,787.84
  5. Step 5: Solve for x
    x = 10,666,799,787.84/98,444.20
  6. Step 6: Final answer
    x = 108,353.77

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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.