Home / 100,076.72-138,140.60-57,652.16

Finding the Fourth Proportional to 100,076.72, 138,140.60 and 57,652.16

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Solution

The fourth proportional to 100,076.72, 138,140.60 and 57,652.16 is: 79,579.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,076.72 : 138,140.60 = 57,652.16 : x
  2. Step 2: Convert to fraction form
    100,076.72/138,140.60 = 57,652.16/x
  3. Step 3: Cross multiply
    100,076.72x = 138,140.60 × 57,652.16
  4. Step 4: Simplify right side
    100,076.72x = 7,964,103,973.70
  5. Step 5: Solve for x
    x = 7,964,103,973.70/100,076.72
  6. Step 6: Final answer
    x = 79,579.99

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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.