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Finding the Fourth Proportional to 70,589.37, 105,886.94 and 18,000.22

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Solution

The fourth proportional to 70,589.37, 105,886.94 and 18,000.22 is: 27,001.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,589.37 : 105,886.94 = 18,000.22 : x
  2. Step 2: Convert to fraction form
    70,589.37/105,886.94 = 18,000.22/x
  3. Step 3: Cross multiply
    70,589.37x = 105,886.94 × 18,000.22
  4. Step 4: Simplify right side
    70,589.37x = 1,905,988,215.13
  5. Step 5: Solve for x
    x = 1,905,988,215.13/70,589.37
  6. Step 6: Final answer
    x = 27,001.07

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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.