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Finding the Fourth Proportional to 101,404.80, 152,128.80 and 31,291.20

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Solution

The fourth proportional to 101,404.80, 152,128.80 and 31,291.20 is: 46,943.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,404.80 : 152,128.80 = 31,291.20 : x
  2. Step 2: Convert to fraction form
    101,404.80/152,128.80 = 31,291.20/x
  3. Step 3: Cross multiply
    101,404.80x = 152,128.80 × 31,291.20
  4. Step 4: Simplify right side
    101,404.80x = 4,760,292,706.56
  5. Step 5: Solve for x
    x = 4,760,292,706.56/101,404.80
  6. Step 6: Final answer
    x = 46,943.47

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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.