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Finding the Fourth Proportional to 71,109.67, 98,129.47 and 39,277.88

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Solution

The fourth proportional to 71,109.67, 98,129.47 and 39,277.88 is: 54,202.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,109.67 : 98,129.47 = 39,277.88 : x
  2. Step 2: Convert to fraction form
    71,109.67/98,129.47 = 39,277.88/x
  3. Step 3: Cross multiply
    71,109.67x = 98,129.47 × 39,277.88
  4. Step 4: Simplify right side
    71,109.67x = 3,854,317,547.12
  5. Step 5: Solve for x
    x = 3,854,317,547.12/71,109.67
  6. Step 6: Final answer
    x = 54,202.44

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1.5x scale

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.