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Finding the Fourth Proportional to 191,504.40, 287,386.20 and 86,269.20

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Solution

The fourth proportional to 191,504.40, 287,386.20 and 86,269.20 is: 129,462.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,504.40 : 287,386.20 = 86,269.20 : x
  2. Step 2: Convert to fraction form
    191,504.40/287,386.20 = 86,269.20/x
  3. Step 3: Cross multiply
    191,504.40x = 287,386.20 × 86,269.20
  4. Step 4: Simplify right side
    191,504.40x = 24,792,577,565.04
  5. Step 5: Solve for x
    x = 24,792,577,565.04/191,504.40
  6. Step 6: Final answer
    x = 129,462.18

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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.