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Finding the Fourth Proportional to 78,719.40, 118,079.10 and 62,130.60

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Solution

The fourth proportional to 78,719.40, 118,079.10 and 62,130.60 is: 93,195.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,719.40 : 118,079.10 = 62,130.60 : x
  2. Step 2: Convert to fraction form
    78,719.40/118,079.10 = 62,130.60/x
  3. Step 3: Cross multiply
    78,719.40x = 118,079.10 × 62,130.60
  4. Step 4: Simplify right side
    78,719.40x = 7,336,325,330.46
  5. Step 5: Solve for x
    x = 7,336,325,330.46/78,719.40
  6. Step 6: Final answer
    x = 93,195.90

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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.