Home / 83,890.12-125,856.96-31,300

Finding the Fourth Proportional to 83,890.12, 125,856.96 and 31,300

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Solution

The fourth proportional to 83,890.12, 125,856.96 and 31,300 is: 46,958.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,890.12 : 125,856.96 = 31,300 : x
  2. Step 2: Convert to fraction form
    83,890.12/125,856.96 = 31,300/x
  3. Step 3: Cross multiply
    83,890.12x = 125,856.96 × 31,300
  4. Step 4: Simplify right side
    83,890.12x = 3,939,322,848
  5. Step 5: Solve for x
    x = 3,939,322,848/83,890.12
  6. Step 6: Final answer
    x = 46,958.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.