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Finding the Fourth Proportional to 86,411.79, 119,302.65 and 66,230.64

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Solution

The fourth proportional to 86,411.79, 119,302.65 and 66,230.64 is: 91,439.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,411.79 : 119,302.65 = 66,230.64 : x
  2. Step 2: Convert to fraction form
    86,411.79/119,302.65 = 66,230.64/x
  3. Step 3: Cross multiply
    86,411.79x = 119,302.65 × 66,230.64
  4. Step 4: Simplify right side
    86,411.79x = 7,901,490,863.20
  5. Step 5: Solve for x
    x = 7,901,490,863.20/86,411.79
  6. Step 6: Final answer
    x = 91,439.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.