Home / 78,219.84-117,328.53-31,471.50

Finding the Fourth Proportional to 78,219.84, 117,328.53 and 31,471.50

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Solution

The fourth proportional to 78,219.84, 117,328.53 and 31,471.50 is: 47,206.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,219.84 : 117,328.53 = 31,471.50 : x
  2. Step 2: Convert to fraction form
    78,219.84/117,328.53 = 31,471.50/x
  3. Step 3: Cross multiply
    78,219.84x = 117,328.53 × 31,471.50
  4. Step 4: Simplify right side
    78,219.84x = 3,692,504,831.90
  5. Step 5: Solve for x
    x = 3,692,504,831.90/78,219.84
  6. Step 6: Final answer
    x = 47,206.76

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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.