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Finding the Fourth Proportional to 215,420.80, 322,363.20 and 136,572.80

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Solution

The fourth proportional to 215,420.80, 322,363.20 and 136,572.80 is: 204,372.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,420.80 : 322,363.20 = 136,572.80 : x
  2. Step 2: Convert to fraction form
    215,420.80/322,363.20 = 136,572.80/x
  3. Step 3: Cross multiply
    215,420.80x = 322,363.20 × 136,572.80
  4. Step 4: Simplify right side
    215,420.80x = 44,026,044,840.96
  5. Step 5: Solve for x
    x = 44,026,044,840.96/215,420.80
  6. Step 6: Final answer
    x = 204,372.30

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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.