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Finding the Fourth Proportional to 143,460.54, 215,280.72 and 54,721.80

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Solution

The fourth proportional to 143,460.54, 215,280.72 and 54,721.80 is: 82,117.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,460.54 : 215,280.72 = 54,721.80 : x
  2. Step 2: Convert to fraction form
    143,460.54/215,280.72 = 54,721.80/x
  3. Step 3: Cross multiply
    143,460.54x = 215,280.72 × 54,721.80
  4. Step 4: Simplify right side
    143,460.54x = 11,780,548,503.70
  5. Step 5: Solve for x
    x = 11,780,548,503.70/143,460.54
  6. Step 6: Final answer
    x = 82,117.00

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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.