Home / 57,070-78,756.87-31,919.50

Finding the Fourth Proportional to 57,070, 78,756.87 and 31,919.50

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Solution

The fourth proportional to 57,070, 78,756.87 and 31,919.50 is: 44,049.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,070 : 78,756.87 = 31,919.50 : x
  2. Step 2: Convert to fraction form
    57,070/78,756.87 = 31,919.50/x
  3. Step 3: Cross multiply
    57,070x = 78,756.87 × 31,919.50
  4. Step 4: Simplify right side
    57,070x = 2,513,879,911.97
  5. Step 5: Solve for x
    x = 2,513,879,911.97/57,070
  6. Step 6: Final answer
    x = 44,049.06

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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.