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Finding the Fourth Proportional to 156,797.16, 216,369.13 and 86,945.84

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Solution

The fourth proportional to 156,797.16, 216,369.13 and 86,945.84 is: 119,979.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,797.16 : 216,369.13 = 86,945.84 : x
  2. Step 2: Convert to fraction form
    156,797.16/216,369.13 = 86,945.84/x
  3. Step 3: Cross multiply
    156,797.16x = 216,369.13 × 86,945.84
  4. Step 4: Simplify right side
    156,797.16x = 18,812,395,323.19
  5. Step 5: Solve for x
    x = 18,812,395,323.19/156,797.16
  6. Step 6: Final answer
    x = 119,979.19

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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.