Home / 76,299.28-105,291.12-42,307.90

Finding the Fourth Proportional to 76,299.28, 105,291.12 and 42,307.90

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Solution

The fourth proportional to 76,299.28, 105,291.12 and 42,307.90 is: 58,383.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,299.28 : 105,291.12 = 42,307.90 : x
  2. Step 2: Convert to fraction form
    76,299.28/105,291.12 = 42,307.90/x
  3. Step 3: Cross multiply
    76,299.28x = 105,291.12 × 42,307.90
  4. Step 4: Simplify right side
    76,299.28x = 4,454,646,175.85
  5. Step 5: Solve for x
    x = 4,454,646,175.85/76,299.28
  6. Step 6: Final answer
    x = 58,383.86

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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.