Home / 100,287.90-138,397.68-57,846.60

Finding the Fourth Proportional to 100,287.90, 138,397.68 and 57,846.60

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Solution

The fourth proportional to 100,287.90, 138,397.68 and 57,846.60 is: 79,828.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,287.90 : 138,397.68 = 57,846.60 : x
  2. Step 2: Convert to fraction form
    100,287.90/138,397.68 = 57,846.60/x
  3. Step 3: Cross multiply
    100,287.90x = 138,397.68 × 57,846.60
  4. Step 4: Simplify right side
    100,287.90x = 8,005,835,235.89
  5. Step 5: Solve for x
    x = 8,005,835,235.89/100,287.90
  6. Step 6: Final answer
    x = 79,828.53

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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.