Home / 84,679.12-126,916.80-31,328.56

Finding the Fourth Proportional to 84,679.12, 126,916.80 and 31,328.56

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Solution

The fourth proportional to 84,679.12, 126,916.80 and 31,328.56 is: 46,955.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,679.12 : 126,916.80 = 31,328.56 : x
  2. Step 2: Convert to fraction form
    84,679.12/126,916.80 = 31,328.56/x
  3. Step 3: Cross multiply
    84,679.12x = 126,916.80 × 31,328.56
  4. Step 4: Simplify right side
    84,679.12x = 3,976,120,583.81
  5. Step 5: Solve for x
    x = 3,976,120,583.81/84,679.12
  6. Step 6: Final answer
    x = 46,955.15

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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.