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Finding the Fourth Proportional to 61,531.25, 92,311.25 and 19,415.50

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Solution

The fourth proportional to 61,531.25, 92,311.25 and 19,415.50 is: 29,127.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,531.25 : 92,311.25 = 19,415.50 : x
  2. Step 2: Convert to fraction form
    61,531.25/92,311.25 = 19,415.50/x
  3. Step 3: Cross multiply
    61,531.25x = 92,311.25 × 19,415.50
  4. Step 4: Simplify right side
    61,531.25x = 1,792,268,746.52
  5. Step 5: Solve for x
    x = 1,792,268,746.52/61,531.25
  6. Step 6: Final answer
    x = 29,127.78

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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.