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Finding the Fourth Proportional to 191,857.80, 288,045.90 and 121,873.80

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Solution

The fourth proportional to 191,857.80, 288,045.90 and 121,873.80 is: 182,975.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,857.80 : 288,045.90 = 121,873.80 : x
  2. Step 2: Convert to fraction form
    191,857.80/288,045.90 = 121,873.80/x
  3. Step 3: Cross multiply
    191,857.80x = 288,045.90 × 121,873.80
  4. Step 4: Simplify right side
    191,857.80x = 35,105,248,407.42
  5. Step 5: Solve for x
    x = 35,105,248,407.42/191,857.80
  6. Step 6: Final answer
    x = 182,975.35

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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.