Home / 80,837.24-121,148.40-42,878.69

Finding the Fourth Proportional to 80,837.24, 121,148.40 and 42,878.69

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Solution

The fourth proportional to 80,837.24, 121,148.40 and 42,878.69 is: 64,261.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,837.24 : 121,148.40 = 42,878.69 : x
  2. Step 2: Convert to fraction form
    80,837.24/121,148.40 = 42,878.69/x
  3. Step 3: Cross multiply
    80,837.24x = 121,148.40 × 42,878.69
  4. Step 4: Simplify right side
    80,837.24x = 5,194,684,687.60
  5. Step 5: Solve for x
    x = 5,194,684,687.60/80,837.24
  6. Step 6: Final answer
    x = 64,261.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.