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Finding the Fourth Proportional to 191,909.80, 288,123.90 and 121,925.80

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Solution

The fourth proportional to 191,909.80, 288,123.90 and 121,925.80 is: 183,053.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,909.80 : 288,123.90 = 121,925.80 : x
  2. Step 2: Convert to fraction form
    191,909.80/288,123.90 = 121,925.80/x
  3. Step 3: Cross multiply
    191,909.80x = 288,123.90 × 121,925.80
  4. Step 4: Simplify right side
    191,909.80x = 35,129,737,006.62
  5. Step 5: Solve for x
    x = 35,129,737,006.62/191,909.80
  6. Step 6: Final answer
    x = 183,053.38

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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.