Home / 76,860.21-106,067.25-42,870.88

Finding the Fourth Proportional to 76,860.21, 106,067.25 and 42,870.88

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Solution

The fourth proportional to 76,860.21, 106,067.25 and 42,870.88 is: 59,161.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,860.21 : 106,067.25 = 42,870.88 : x
  2. Step 2: Convert to fraction form
    76,860.21/106,067.25 = 42,870.88/x
  3. Step 3: Cross multiply
    76,860.21x = 106,067.25 × 42,870.88
  4. Step 4: Simplify right side
    76,860.21x = 4,547,195,972.29
  5. Step 5: Solve for x
    x = 4,547,195,972.29/76,860.21
  6. Step 6: Final answer
    x = 59,161.90

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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.