Home / 76,115.18-105,036.35-42,125.11

Finding the Fourth Proportional to 76,115.18, 105,036.35 and 42,125.11

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Solution

The fourth proportional to 76,115.18, 105,036.35 and 42,125.11 is: 58,131.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,115.18 : 105,036.35 = 42,125.11 : x
  2. Step 2: Convert to fraction form
    76,115.18/105,036.35 = 42,125.11/x
  3. Step 3: Cross multiply
    76,115.18x = 105,036.35 × 42,125.11
  4. Step 4: Simplify right side
    76,115.18x = 4,424,667,797.75
  5. Step 5: Solve for x
    x = 4,424,667,797.75/76,115.18
  6. Step 6: Final answer
    x = 58,131.21

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1.5x scale

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.