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Finding the Fourth Proportional to 61,981.52, 92,978.44 and 19,851.02

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Solution

The fourth proportional to 61,981.52, 92,978.44 and 19,851.02 is: 29,778.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,981.52 : 92,978.44 = 19,851.02 : x
  2. Step 2: Convert to fraction form
    61,981.52/92,978.44 = 19,851.02/x
  3. Step 3: Cross multiply
    61,981.52x = 92,978.44 × 19,851.02
  4. Step 4: Simplify right side
    61,981.52x = 1,845,716,872.01
  5. Step 5: Solve for x
    x = 1,845,716,872.01/61,981.52
  6. Step 6: Final answer
    x = 29,778.50

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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.