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Finding the Fourth Proportional to 120,925.20, 181,387.80 and 47,053.20

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Solution

The fourth proportional to 120,925.20, 181,387.80 and 47,053.20 is: 70,579.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,925.20 : 181,387.80 = 47,053.20 : x
  2. Step 2: Convert to fraction form
    120,925.20/181,387.80 = 47,053.20/x
  3. Step 3: Cross multiply
    120,925.20x = 181,387.80 × 47,053.20
  4. Step 4: Simplify right side
    120,925.20x = 8,534,876,430.96
  5. Step 5: Solve for x
    x = 8,534,876,430.96/120,925.20
  6. Step 6: Final answer
    x = 70,579.80

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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.