Home / 76,115.12-105,039.05-42,125.94

Finding the Fourth Proportional to 76,115.12, 105,039.05 and 42,125.94

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Solution

The fourth proportional to 76,115.12, 105,039.05 and 42,125.94 is: 58,133.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,115.12 : 105,039.05 = 42,125.94 : x
  2. Step 2: Convert to fraction form
    76,115.12/105,039.05 = 42,125.94/x
  3. Step 3: Cross multiply
    76,115.12x = 105,039.05 × 42,125.94
  4. Step 4: Simplify right side
    76,115.12x = 4,424,868,507.33
  5. Step 5: Solve for x
    x = 4,424,868,507.33/76,115.12
  6. Step 6: Final answer
    x = 58,133.90

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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.