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Finding the Fourth Proportional to 216,443.70, 298,498.91 and 135,878.72

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Solution

The fourth proportional to 216,443.70, 298,498.91 and 135,878.72 is: 187,391.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,443.70 : 298,498.91 = 135,878.72 : x
  2. Step 2: Convert to fraction form
    216,443.70/298,498.91 = 135,878.72/x
  3. Step 3: Cross multiply
    216,443.70x = 298,498.91 × 135,878.72
  4. Step 4: Simplify right side
    216,443.70x = 40,559,647,640.31
  5. Step 5: Solve for x
    x = 40,559,647,640.31/216,443.70
  6. Step 6: Final answer
    x = 187,391.21

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1.5x scale

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.