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Finding the Fourth Proportional to 141,871.20, 212,806.80 and 57,631.20

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Solution

The fourth proportional to 141,871.20, 212,806.80 and 57,631.20 is: 86,446.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,871.20 : 212,806.80 = 57,631.20 : x
  2. Step 2: Convert to fraction form
    141,871.20/212,806.80 = 57,631.20/x
  3. Step 3: Cross multiply
    141,871.20x = 212,806.80 × 57,631.20
  4. Step 4: Simplify right side
    141,871.20x = 12,264,311,252.16
  5. Step 5: Solve for x
    x = 12,264,311,252.16/141,871.20
  6. Step 6: Final answer
    x = 86,446.80

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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.