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Finding the Fourth Proportional to 191,115.90, 286,279.65 and 111,990.30

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Solution

The fourth proportional to 191,115.90, 286,279.65 and 111,990.30 is: 167,754.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,115.90 : 286,279.65 = 111,990.30 : x
  2. Step 2: Convert to fraction form
    191,115.90/286,279.65 = 111,990.30/x
  3. Step 3: Cross multiply
    191,115.90x = 286,279.65 × 111,990.30
  4. Step 4: Simplify right side
    191,115.90x = 32,060,543,887.40
  5. Step 5: Solve for x
    x = 32,060,543,887.40/191,115.90
  6. Step 6: Final answer
    x = 167,754.46

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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.