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Finding the Fourth Proportional to 70,693.88, 106,014.84 and 20,761.16

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Solution

The fourth proportional to 70,693.88, 106,014.84 and 20,761.16 is: 31,134.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,693.88 : 106,014.84 = 20,761.16 : x
  2. Step 2: Convert to fraction form
    70,693.88/106,014.84 = 20,761.16/x
  3. Step 3: Cross multiply
    70,693.88x = 106,014.84 × 20,761.16
  4. Step 4: Simplify right side
    70,693.88x = 2,200,991,055.61
  5. Step 5: Solve for x
    x = 2,200,991,055.61/70,693.88
  6. Step 6: Final answer
    x = 31,134.11

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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.