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Finding the Fourth Proportional to 100,307.39, 150,147.29 and 64,721.09

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Solution

The fourth proportional to 100,307.39, 150,147.29 and 64,721.09 is: 96,879.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,307.39 : 150,147.29 = 64,721.09 : x
  2. Step 2: Convert to fraction form
    100,307.39/150,147.29 = 64,721.09/x
  3. Step 3: Cross multiply
    100,307.39x = 150,147.29 × 64,721.09
  4. Step 4: Simplify right side
    100,307.39x = 9,717,696,806.52
  5. Step 5: Solve for x
    x = 9,717,696,806.52/100,307.39
  6. Step 6: Final answer
    x = 96,879.18

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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.