Home / 76,139.10-105,072.20-41,213.75

Finding the Fourth Proportional to 76,139.10, 105,072.20 and 41,213.75

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Solution

The fourth proportional to 76,139.10, 105,072.20 and 41,213.75 is: 56,875.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,139.10 : 105,072.20 = 41,213.75 : x
  2. Step 2: Convert to fraction form
    76,139.10/105,072.20 = 41,213.75/x
  3. Step 3: Cross multiply
    76,139.10x = 105,072.20 × 41,213.75
  4. Step 4: Simplify right side
    76,139.10x = 4,330,418,651.32
  5. Step 5: Solve for x
    x = 4,330,418,651.32/76,139.10
  6. Step 6: Final answer
    x = 56,875.10

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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.