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Finding the Fourth Proportional to 89,392.76, 133,885.02 and 42,678.44

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Solution

The fourth proportional to 89,392.76, 133,885.02 and 42,678.44 is: 63,920.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,392.76 : 133,885.02 = 42,678.44 : x
  2. Step 2: Convert to fraction form
    89,392.76/133,885.02 = 42,678.44/x
  3. Step 3: Cross multiply
    89,392.76x = 133,885.02 × 42,678.44
  4. Step 4: Simplify right side
    89,392.76x = 5,714,003,792.97
  5. Step 5: Solve for x
    x = 5,714,003,792.97/89,392.76
  6. Step 6: Final answer
    x = 63,920.21

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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.