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Finding the Fourth Proportional to 61,061.90, 91,605.92 and 18,941.07

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Solution

The fourth proportional to 61,061.90, 91,605.92 and 18,941.07 is: 28,415.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,061.90 : 91,605.92 = 18,941.07 : x
  2. Step 2: Convert to fraction form
    61,061.90/91,605.92 = 18,941.07/x
  3. Step 3: Cross multiply
    61,061.90x = 91,605.92 × 18,941.07
  4. Step 4: Simplify right side
    61,061.90x = 1,735,113,961.47
  5. Step 5: Solve for x
    x = 1,735,113,961.47/61,061.90
  6. Step 6: Final answer
    x = 28,415.66

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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.