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Finding the Fourth Proportional to 70,998.71, 97,978.55 and 39,167.60

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Solution

The fourth proportional to 70,998.71, 97,978.55 and 39,167.60 is: 54,051.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,998.71 : 97,978.55 = 39,167.60 : x
  2. Step 2: Convert to fraction form
    70,998.71/97,978.55 = 39,167.60/x
  3. Step 3: Cross multiply
    70,998.71x = 97,978.55 × 39,167.60
  4. Step 4: Simplify right side
    70,998.71x = 3,837,583,969.25
  5. Step 5: Solve for x
    x = 3,837,583,969.25/70,998.71
  6. Step 6: Final answer
    x = 54,051.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.