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Finding the Fourth Proportional to 260,073.71, 390,223.25 and 91,714.33

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Solution

The fourth proportional to 260,073.71, 390,223.25 and 91,714.33 is: 137,611.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,073.71 : 390,223.25 = 91,714.33 : x
  2. Step 2: Convert to fraction form
    260,073.71/390,223.25 = 91,714.33/x
  3. Step 3: Cross multiply
    260,073.71x = 390,223.25 × 91,714.33
  4. Step 4: Simplify right side
    260,073.71x = 35,789,063,924.17
  5. Step 5: Solve for x
    x = 35,789,063,924.17/260,073.71
  6. Step 6: Final answer
    x = 137,611.23

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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.