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Finding the Fourth Proportional to 191,790.80, 287,640.12 and 98,248.40

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Solution

The fourth proportional to 191,790.80, 287,640.12 and 98,248.40 is: 147,348.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,790.80 : 287,640.12 = 98,248.40 : x
  2. Step 2: Convert to fraction form
    191,790.80/287,640.12 = 98,248.40/x
  3. Step 3: Cross multiply
    191,790.80x = 287,640.12 × 98,248.40
  4. Step 4: Simplify right side
    191,790.80x = 28,260,181,565.81
  5. Step 5: Solve for x
    x = 28,260,181,565.81/191,790.80
  6. Step 6: Final answer
    x = 147,348.99

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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.