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Finding the Fourth Proportional to 147,694.40, 221,390.40 and 72,699.20

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Solution

The fourth proportional to 147,694.40, 221,390.40 and 72,699.20 is: 108,974.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,694.40 : 221,390.40 = 72,699.20 : x
  2. Step 2: Convert to fraction form
    147,694.40/221,390.40 = 72,699.20/x
  3. Step 3: Cross multiply
    147,694.40x = 221,390.40 × 72,699.20
  4. Step 4: Simplify right side
    147,694.40x = 16,094,904,967.68
  5. Step 5: Solve for x
    x = 16,094,904,967.68/147,694.40
  6. Step 6: Final answer
    x = 108,974.38

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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.