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Finding the Fourth Proportional to 191,142.70, 286,843.65 and 124,420.30

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Solution

The fourth proportional to 191,142.70, 286,843.65 and 124,420.30 is: 186,714.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,142.70 : 286,843.65 = 124,420.30 : x
  2. Step 2: Convert to fraction form
    191,142.70/286,843.65 = 124,420.30/x
  3. Step 3: Cross multiply
    191,142.70x = 286,843.65 × 124,420.30
  4. Step 4: Simplify right side
    191,142.70x = 35,689,172,986.10
  5. Step 5: Solve for x
    x = 35,689,172,986.10/191,142.70
  6. Step 6: Final answer
    x = 186,714.81

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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.