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Finding the Fourth Proportional to 147,812.80, 221,719.20 and 88,715.20

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Solution

The fourth proportional to 147,812.80, 221,719.20 and 88,715.20 is: 133,072.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,812.80 : 221,719.20 = 88,715.20 : x
  2. Step 2: Convert to fraction form
    147,812.80/221,719.20 = 88,715.20/x
  3. Step 3: Cross multiply
    147,812.80x = 221,719.20 × 88,715.20
  4. Step 4: Simplify right side
    147,812.80x = 19,669,863,171.84
  5. Step 5: Solve for x
    x = 19,669,863,171.84/147,812.80
  6. Step 6: Final answer
    x = 133,072.80

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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.