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Finding the Fourth Proportional to 112,986.40, 169,544.40 and 77,951.20

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Solution

The fourth proportional to 112,986.40, 169,544.40 and 77,951.20 is: 116,971.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,986.40 : 169,544.40 = 77,951.20 : x
  2. Step 2: Convert to fraction form
    112,986.40/169,544.40 = 77,951.20/x
  3. Step 3: Cross multiply
    112,986.40x = 169,544.40 × 77,951.20
  4. Step 4: Simplify right side
    112,986.40x = 13,216,189,433.28
  5. Step 5: Solve for x
    x = 13,216,189,433.28/112,986.40
  6. Step 6: Final answer
    x = 116,971.51

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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.