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Finding the Fourth Proportional to 172,557.90, 258,865.20 and 54,200.70

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Solution

The fourth proportional to 172,557.90, 258,865.20 and 54,200.70 is: 81,309.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,557.90 : 258,865.20 = 54,200.70 : x
  2. Step 2: Convert to fraction form
    172,557.90/258,865.20 = 54,200.70/x
  3. Step 3: Cross multiply
    172,557.90x = 258,865.20 × 54,200.70
  4. Step 4: Simplify right side
    172,557.90x = 14,030,675,045.64
  5. Step 5: Solve for x
    x = 14,030,675,045.64/172,557.90
  6. Step 6: Final answer
    x = 81,309.95

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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.