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Finding the Fourth Proportional to 172,639.60, 258,959.40 and 54,347.20

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Solution

The fourth proportional to 172,639.60, 258,959.40 and 54,347.20 is: 81,520.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,639.60 : 258,959.40 = 54,347.20 : x
  2. Step 2: Convert to fraction form
    172,639.60/258,959.40 = 54,347.20/x
  3. Step 3: Cross multiply
    172,639.60x = 258,959.40 × 54,347.20
  4. Step 4: Simplify right side
    172,639.60x = 14,073,718,303.68
  5. Step 5: Solve for x
    x = 14,073,718,303.68/172,639.60
  6. Step 6: Final answer
    x = 81,520.80

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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.