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Finding the Fourth Proportional to 70,615.31, 105,926.60 and 18,025.25

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Solution

The fourth proportional to 70,615.31, 105,926.60 and 18,025.25 is: 27,038.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,615.31 : 105,926.60 = 18,025.25 : x
  2. Step 2: Convert to fraction form
    70,615.31/105,926.60 = 18,025.25/x
  3. Step 3: Cross multiply
    70,615.31x = 105,926.60 × 18,025.25
  4. Step 4: Simplify right side
    70,615.31x = 1,909,352,962.08
  5. Step 5: Solve for x
    x = 1,909,352,962.08/70,615.31
  6. Step 6: Final answer
    x = 27,038.80

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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.