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Finding the Fourth Proportional to 172,989.60, 260,067.60 and 147,328.80

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Solution

The fourth proportional to 172,989.60, 260,067.60 and 147,328.80 is: 221,489.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,989.60 : 260,067.60 = 147,328.80 : x
  2. Step 2: Convert to fraction form
    172,989.60/260,067.60 = 147,328.80/x
  3. Step 3: Cross multiply
    172,989.60x = 260,067.60 × 147,328.80
  4. Step 4: Simplify right side
    172,989.60x = 38,315,447,426.88
  5. Step 5: Solve for x
    x = 38,315,447,426.88/172,989.60
  6. Step 6: Final answer
    x = 221,489.89

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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.