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Finding the Fourth Proportional to 61,420.68, 91,959.93 and 31,369.85

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Solution

The fourth proportional to 61,420.68, 91,959.93 and 31,369.85 is: 46,967.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,420.68 : 91,959.93 = 31,369.85 : x
  2. Step 2: Convert to fraction form
    61,420.68/91,959.93 = 31,369.85/x
  3. Step 3: Cross multiply
    61,420.68x = 91,959.93 × 31,369.85
  4. Step 4: Simplify right side
    61,420.68x = 2,884,768,750.31
  5. Step 5: Solve for x
    x = 2,884,768,750.31/61,420.68
  6. Step 6: Final answer
    x = 46,967.39

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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.