Home / 78,150.23-107,849.36-47,918.15

Finding the Fourth Proportional to 78,150.23, 107,849.36 and 47,918.15

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Solution

The fourth proportional to 78,150.23, 107,849.36 and 47,918.15 is: 66,128.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,150.23 : 107,849.36 = 47,918.15 : x
  2. Step 2: Convert to fraction form
    78,150.23/107,849.36 = 47,918.15/x
  3. Step 3: Cross multiply
    78,150.23x = 107,849.36 × 47,918.15
  4. Step 4: Simplify right side
    78,150.23x = 5,167,941,525.33
  5. Step 5: Solve for x
    x = 5,167,941,525.33/78,150.23
  6. Step 6: Final answer
    x = 66,128.29

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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.