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Finding the Fourth Proportional to 178,355.70, 267,620.70 and 78,503.40

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Solution

The fourth proportional to 178,355.70, 267,620.70 and 78,503.40 is: 117,793.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,355.70 : 267,620.70 = 78,503.40 : x
  2. Step 2: Convert to fraction form
    178,355.70/267,620.70 = 78,503.40/x
  3. Step 3: Cross multiply
    178,355.70x = 267,620.70 × 78,503.40
  4. Step 4: Simplify right side
    178,355.70x = 21,009,134,860.38
  5. Step 5: Solve for x
    x = 21,009,134,860.38/178,355.70
  6. Step 6: Final answer
    x = 117,793.46

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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.