Home / 78,824.91-118,244.70-31,428.54

Finding the Fourth Proportional to 78,824.91, 118,244.70 and 31,428.54

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Solution

The fourth proportional to 78,824.91, 118,244.70 and 31,428.54 is: 47,145.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,824.91 : 118,244.70 = 31,428.54 : x
  2. Step 2: Convert to fraction form
    78,824.91/118,244.70 = 31,428.54/x
  3. Step 3: Cross multiply
    78,824.91x = 118,244.70 × 31,428.54
  4. Step 4: Simplify right side
    78,824.91x = 3,716,258,283.74
  5. Step 5: Solve for x
    x = 3,716,258,283.74/78,824.91
  6. Step 6: Final answer
    x = 47,145.73

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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.