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Finding the Fourth Proportional to 172,840.60, 259,217.70 and 66,201.40

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Solution

The fourth proportional to 172,840.60, 259,217.70 and 66,201.40 is: 99,285.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,840.60 : 259,217.70 = 66,201.40 : x
  2. Step 2: Convert to fraction form
    172,840.60/259,217.70 = 66,201.40/x
  3. Step 3: Cross multiply
    172,840.60x = 259,217.70 × 66,201.40
  4. Step 4: Simplify right side
    172,840.60x = 17,160,574,644.78
  5. Step 5: Solve for x
    x = 17,160,574,644.78/172,840.60
  6. Step 6: Final answer
    x = 99,285.55

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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.