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Finding the Fourth Proportional to 70,589.76, 105,887.50 and 18,000.60

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Solution

The fourth proportional to 70,589.76, 105,887.50 and 18,000.60 is: 27,001.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,589.76 : 105,887.50 = 18,000.60 : x
  2. Step 2: Convert to fraction form
    70,589.76/105,887.50 = 18,000.60/x
  3. Step 3: Cross multiply
    70,589.76x = 105,887.50 × 18,000.60
  4. Step 4: Simplify right side
    70,589.76x = 1,906,038,532.50
  5. Step 5: Solve for x
    x = 1,906,038,532.50/70,589.76
  6. Step 6: Final answer
    x = 27,001.63

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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.