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Finding the Fourth Proportional to 147,658.60, 221,552.70 and 68,732.20

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Solution

The fourth proportional to 147,658.60, 221,552.70 and 68,732.20 is: 103,128.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,658.60 : 221,552.70 = 68,732.20 : x
  2. Step 2: Convert to fraction form
    147,658.60/221,552.70 = 68,732.20/x
  3. Step 3: Cross multiply
    147,658.60x = 221,552.70 × 68,732.20
  4. Step 4: Simplify right side
    147,658.60x = 15,227,804,486.94
  5. Step 5: Solve for x
    x = 15,227,804,486.94/147,658.60
  6. Step 6: Final answer
    x = 103,128.46

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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.