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Finding the Fourth Proportional to 89,704.80, 134,848.80 and 76,874.40

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Solution

The fourth proportional to 89,704.80, 134,848.80 and 76,874.40 is: 115,561.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,704.80 : 134,848.80 = 76,874.40 : x
  2. Step 2: Convert to fraction form
    89,704.80/134,848.80 = 76,874.40/x
  3. Step 3: Cross multiply
    89,704.80x = 134,848.80 × 76,874.40
  4. Step 4: Simplify right side
    89,704.80x = 10,366,420,590.72
  5. Step 5: Solve for x
    x = 10,366,420,590.72/89,704.80
  6. Step 6: Final answer
    x = 115,561.49

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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.