Home / 85,331.14-127,901.30-31,971.78

Finding the Fourth Proportional to 85,331.14, 127,901.30 and 31,971.78

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Solution

The fourth proportional to 85,331.14, 127,901.30 and 31,971.78 is: 47,921.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,331.14 : 127,901.30 = 31,971.78 : x
  2. Step 2: Convert to fraction form
    85,331.14/127,901.30 = 31,971.78/x
  3. Step 3: Cross multiply
    85,331.14x = 127,901.30 × 31,971.78
  4. Step 4: Simplify right side
    85,331.14x = 4,089,232,225.31
  5. Step 5: Solve for x
    x = 4,089,232,225.31/85,331.14
  6. Step 6: Final answer
    x = 47,921.92

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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.