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Finding the Fourth Proportional to 101,885.21, 140,684.13 and 63,689.25

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Solution

The fourth proportional to 101,885.21, 140,684.13 and 63,689.25 is: 87,942.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,885.21 : 140,684.13 = 63,689.25 : x
  2. Step 2: Convert to fraction form
    101,885.21/140,684.13 = 63,689.25/x
  3. Step 3: Cross multiply
    101,885.21x = 140,684.13 × 63,689.25
  4. Step 4: Simplify right side
    101,885.21x = 8,960,066,726.60
  5. Step 5: Solve for x
    x = 8,960,066,726.60/101,885.21
  6. Step 6: Final answer
    x = 87,942.77

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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.