Home / 78,989.34-118,480.36-19,823.70

Finding the Fourth Proportional to 78,989.34, 118,480.36 and 19,823.70

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Solution

The fourth proportional to 78,989.34, 118,480.36 and 19,823.70 is: 29,734.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,989.34 : 118,480.36 = 19,823.70 : x
  2. Step 2: Convert to fraction form
    78,989.34/118,480.36 = 19,823.70/x
  3. Step 3: Cross multiply
    78,989.34x = 118,480.36 × 19,823.70
  4. Step 4: Simplify right side
    78,989.34x = 2,348,719,112.53
  5. Step 5: Solve for x
    x = 2,348,719,112.53/78,989.34
  6. Step 6: Final answer
    x = 29,734.63

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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.