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Finding the Fourth Proportional to 147,930.40, 221,744.40 and 72,935.20

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Solution

The fourth proportional to 147,930.40, 221,744.40 and 72,935.20 is: 109,328.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,930.40 : 221,744.40 = 72,935.20 : x
  2. Step 2: Convert to fraction form
    147,930.40/221,744.40 = 72,935.20/x
  3. Step 3: Cross multiply
    147,930.40x = 221,744.40 × 72,935.20
  4. Step 4: Simplify right side
    147,930.40x = 16,172,972,162.88
  5. Step 5: Solve for x
    x = 16,172,972,162.88/147,930.40
  6. Step 6: Final answer
    x = 109,328.25

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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.