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Finding the Fourth Proportional to 247,938.80, 371,908.20 and 142,962.80

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Solution

The fourth proportional to 247,938.80, 371,908.20 and 142,962.80 is: 214,444.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,938.80 : 371,908.20 = 142,962.80 : x
  2. Step 2: Convert to fraction form
    247,938.80/371,908.20 = 142,962.80/x
  3. Step 3: Cross multiply
    247,938.80x = 371,908.20 × 142,962.80
  4. Step 4: Simplify right side
    247,938.80x = 53,169,037,614.96
  5. Step 5: Solve for x
    x = 53,169,037,614.96/247,938.80
  6. Step 6: Final answer
    x = 214,444.20

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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.