Home / 153,400.57-211,758.11-103,128.73

Finding the Fourth Proportional to 153,400.57, 211,758.11 and 103,128.73

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Solution

The fourth proportional to 153,400.57, 211,758.11 and 103,128.73 is: 142,361.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,400.57 : 211,758.11 = 103,128.73 : x
  2. Step 2: Convert to fraction form
    153,400.57/211,758.11 = 103,128.73/x
  3. Step 3: Cross multiply
    153,400.57x = 211,758.11 × 103,128.73
  4. Step 4: Simplify right side
    153,400.57x = 21,838,344,951.50
  5. Step 5: Solve for x
    x = 21,838,344,951.50/153,400.57
  6. Step 6: Final answer
    x = 142,361.56

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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.