Home / 156,121.57-215,301.55-103,640.73

Finding the Fourth Proportional to 156,121.57, 215,301.55 and 103,640.73

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Solution

The fourth proportional to 156,121.57, 215,301.55 and 103,640.73 is: 142,927.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,121.57 : 215,301.55 = 103,640.73 : x
  2. Step 2: Convert to fraction form
    156,121.57/215,301.55 = 103,640.73/x
  3. Step 3: Cross multiply
    156,121.57x = 215,301.55 × 103,640.73
  4. Step 4: Simplify right side
    156,121.57x = 22,314,009,812.13
  5. Step 5: Solve for x
    x = 22,314,009,812.13/156,121.57
  6. Step 6: Final answer
    x = 142,927.14

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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.