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Finding the Fourth Proportional to 109,689.44, 151,345.40 and 63,721.73

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Solution

The fourth proportional to 109,689.44, 151,345.40 and 63,721.73 is: 87,920.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,689.44 : 151,345.40 = 63,721.73 : x
  2. Step 2: Convert to fraction form
    109,689.44/151,345.40 = 63,721.73/x
  3. Step 3: Cross multiply
    109,689.44x = 151,345.40 × 63,721.73
  4. Step 4: Simplify right side
    109,689.44x = 9,643,989,640.21
  5. Step 5: Solve for x
    x = 9,643,989,640.21/109,689.44
  6. Step 6: Final answer
    x = 87,920.86

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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.