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Finding the Fourth Proportional to 78,371.60, 117,557.40 and 67,096.40

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Solution

The fourth proportional to 78,371.60, 117,557.40 and 67,096.40 is: 100,644.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,371.60 : 117,557.40 = 67,096.40 : x
  2. Step 2: Convert to fraction form
    78,371.60/117,557.40 = 67,096.40/x
  3. Step 3: Cross multiply
    78,371.60x = 117,557.40 × 67,096.40
  4. Step 4: Simplify right side
    78,371.60x = 7,887,678,333.36
  5. Step 5: Solve for x
    x = 7,887,678,333.36/78,371.60
  6. Step 6: Final answer
    x = 100,644.60

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1.5x scale

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.