Home / 78,717.30-118,112.40-41,319.60

Finding the Fourth Proportional to 78,717.30, 118,112.40 and 41,319.60

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Solution

The fourth proportional to 78,717.30, 118,112.40 and 41,319.60 is: 61,998.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,717.30 : 118,112.40 = 41,319.60 : x
  2. Step 2: Convert to fraction form
    78,717.30/118,112.40 = 41,319.60/x
  3. Step 3: Cross multiply
    78,717.30x = 118,112.40 × 41,319.60
  4. Step 4: Simplify right side
    78,717.30x = 4,880,357,123.04
  5. Step 5: Solve for x
    x = 4,880,357,123.04/78,717.30
  6. Step 6: Final answer
    x = 61,998.53

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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.