Home / 78,470.55-117,705.83-69,868.95

Finding the Fourth Proportional to 78,470.55, 117,705.83 and 69,868.95

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Solution

The fourth proportional to 78,470.55, 117,705.83 and 69,868.95 is: 104,803.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,470.55 : 117,705.83 = 69,868.95 : x
  2. Step 2: Convert to fraction form
    78,470.55/117,705.83 = 69,868.95/x
  3. Step 3: Cross multiply
    78,470.55x = 117,705.83 × 69,868.95
  4. Step 4: Simplify right side
    78,470.55x = 8,223,982,401.63
  5. Step 5: Solve for x
    x = 8,223,982,401.63/78,470.55
  6. Step 6: Final answer
    x = 104,803.43

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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.