Home / 78,586.31-117,880.68-43,747.40

Finding the Fourth Proportional to 78,586.31, 117,880.68 and 43,747.40

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Solution

The fourth proportional to 78,586.31, 117,880.68 and 43,747.40 is: 65,621.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,586.31 : 117,880.68 = 43,747.40 : x
  2. Step 2: Convert to fraction form
    78,586.31/117,880.68 = 43,747.40/x
  3. Step 3: Cross multiply
    78,586.31x = 117,880.68 × 43,747.40
  4. Step 4: Simplify right side
    78,586.31x = 5,156,972,670.83
  5. Step 5: Solve for x
    x = 5,156,972,670.83/78,586.31
  6. Step 6: Final answer
    x = 65,621.77

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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.