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Finding the Fourth Proportional to 191,285.70, 286,928.55 and 102,712.20

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Solution

The fourth proportional to 191,285.70, 286,928.55 and 102,712.20 is: 154,068.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,285.70 : 286,928.55 = 102,712.20 : x
  2. Step 2: Convert to fraction form
    191,285.70/286,928.55 = 102,712.20/x
  3. Step 3: Cross multiply
    191,285.70x = 286,928.55 × 102,712.20
  4. Step 4: Simplify right side
    191,285.70x = 29,471,062,613.31
  5. Step 5: Solve for x
    x = 29,471,062,613.31/191,285.70
  6. Step 6: Final answer
    x = 154,068.30

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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.