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Finding the Fourth Proportional to 147,812.80, 221,719.20 and 54,306.40

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Solution

The fourth proportional to 147,812.80, 221,719.20 and 54,306.40 is: 81,459.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,812.80 : 221,719.20 = 54,306.40 : x
  2. Step 2: Convert to fraction form
    147,812.80/221,719.20 = 54,306.40/x
  3. Step 3: Cross multiply
    147,812.80x = 221,719.20 × 54,306.40
  4. Step 4: Simplify right side
    147,812.80x = 12,040,771,562.88
  5. Step 5: Solve for x
    x = 12,040,771,562.88/147,812.80
  6. Step 6: Final answer
    x = 81,459.60

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1.5x scale

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.