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Finding the Fourth Proportional to 70,689.88, 106,008.88 and 20,757.16

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Solution

The fourth proportional to 70,689.88, 106,008.88 and 20,757.16 is: 31,128.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,689.88 : 106,008.88 = 20,757.16 : x
  2. Step 2: Convert to fraction form
    70,689.88/106,008.88 = 20,757.16/x
  3. Step 3: Cross multiply
    70,689.88x = 106,008.88 × 20,757.16
  4. Step 4: Simplify right side
    70,689.88x = 2,200,443,283.58
  5. Step 5: Solve for x
    x = 2,200,443,283.58/70,689.88
  6. Step 6: Final answer
    x = 31,128.12

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1.5x scale

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.