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Finding the Fourth Proportional to 156,652.80, 234,979.20 and 77,920.80

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Solution

The fourth proportional to 156,652.80, 234,979.20 and 77,920.80 is: 116,881.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,652.80 : 234,979.20 = 77,920.80 : x
  2. Step 2: Convert to fraction form
    156,652.80/234,979.20 = 77,920.80/x
  3. Step 3: Cross multiply
    156,652.80x = 234,979.20 × 77,920.80
  4. Step 4: Simplify right side
    156,652.80x = 18,309,767,247.36
  5. Step 5: Solve for x
    x = 18,309,767,247.36/156,652.80
  6. Step 6: Final answer
    x = 116,881.20

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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.