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Finding the Fourth Proportional to 112,578.65, 155,358.57 and 64,830.97

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Solution

The fourth proportional to 112,578.65, 155,358.57 and 64,830.97 is: 89,466.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,578.65 : 155,358.57 = 64,830.97 : x
  2. Step 2: Convert to fraction form
    112,578.65/155,358.57 = 64,830.97/x
  3. Step 3: Cross multiply
    112,578.65x = 155,358.57 × 64,830.97
  4. Step 4: Simplify right side
    112,578.65x = 10,072,046,790.91
  5. Step 5: Solve for x
    x = 10,072,046,790.91/112,578.65
  6. Step 6: Final answer
    x = 89,466.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.