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Finding the Fourth Proportional to 191,611.20, 287,416.80 and 172,948.80

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Solution

The fourth proportional to 191,611.20, 287,416.80 and 172,948.80 is: 259,423.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,611.20 : 287,416.80 = 172,948.80 : x
  2. Step 2: Convert to fraction form
    191,611.20/287,416.80 = 172,948.80/x
  3. Step 3: Cross multiply
    191,611.20x = 287,416.80 × 172,948.80
  4. Step 4: Simplify right side
    191,611.20x = 49,708,390,659.84
  5. Step 5: Solve for x
    x = 49,708,390,659.84/191,611.20
  6. Step 6: Final answer
    x = 259,423.20

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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.