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Finding the Fourth Proportional to 70,615.43, 105,926.79 and 18,025.37

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Solution

The fourth proportional to 70,615.43, 105,926.79 and 18,025.37 is: 27,038.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,615.43 : 105,926.79 = 18,025.37 : x
  2. Step 2: Convert to fraction form
    70,615.43/105,926.79 = 18,025.37/x
  3. Step 3: Cross multiply
    70,615.43x = 105,926.79 × 18,025.37
  4. Step 4: Simplify right side
    70,615.43x = 1,909,369,582.66
  5. Step 5: Solve for x
    x = 1,909,369,582.66/70,615.43
  6. Step 6: Final answer
    x = 27,038.99

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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.