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Finding the Fourth Proportional to 172,392.60, 258,588.90 and 83,819.10

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Solution

The fourth proportional to 172,392.60, 258,588.90 and 83,819.10 is: 125,728.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,392.60 : 258,588.90 = 83,819.10 : x
  2. Step 2: Convert to fraction form
    172,392.60/258,588.90 = 83,819.10/x
  3. Step 3: Cross multiply
    172,392.60x = 258,588.90 × 83,819.10
  4. Step 4: Simplify right side
    172,392.60x = 21,674,688,867.99
  5. Step 5: Solve for x
    x = 21,674,688,867.99/172,392.60
  6. Step 6: Final answer
    x = 125,728.65

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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.