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Finding the Fourth Proportional to 61,930.26, 85,420.26 and 38,070.09

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Solution

The fourth proportional to 61,930.26, 85,420.26 and 38,070.09 is: 52,509.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,930.26 : 85,420.26 = 38,070.09 : x
  2. Step 2: Convert to fraction form
    61,930.26/85,420.26 = 38,070.09/x
  3. Step 3: Cross multiply
    61,930.26x = 85,420.26 × 38,070.09
  4. Step 4: Simplify right side
    61,930.26x = 3,251,956,986.02
  5. Step 5: Solve for x
    x = 3,251,956,986.02/61,930.26
  6. Step 6: Final answer
    x = 52,509.98

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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.