Home / 115,870.64-159,775.02-100,628.78

Finding the Fourth Proportional to 115,870.64, 159,775.02 and 100,628.78

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Solution

The fourth proportional to 115,870.64, 159,775.02 and 100,628.78 is: 138,757.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,870.64 : 159,775.02 = 100,628.78 : x
  2. Step 2: Convert to fraction form
    115,870.64/159,775.02 = 100,628.78/x
  3. Step 3: Cross multiply
    115,870.64x = 159,775.02 × 100,628.78
  4. Step 4: Simplify right side
    115,870.64x = 16,077,964,538.20
  5. Step 5: Solve for x
    x = 16,077,964,538.20/115,870.64
  6. Step 6: Final answer
    x = 138,757.89

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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.