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Finding the Fourth Proportional to 157,838.33, 217,888.61 and 100,556.21

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Solution

The fourth proportional to 157,838.33, 217,888.61 and 100,556.21 is: 138,813.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,838.33 : 217,888.61 = 100,556.21 : x
  2. Step 2: Convert to fraction form
    157,838.33/217,888.61 = 100,556.21/x
  3. Step 3: Cross multiply
    157,838.33x = 217,888.61 × 100,556.21
  4. Step 4: Simplify right side
    157,838.33x = 21,910,052,535.71
  5. Step 5: Solve for x
    x = 21,910,052,535.71/157,838.33
  6. Step 6: Final answer
    x = 138,813.25

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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.