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Finding the Fourth Proportional to 61,959.88, 92,978.70 and 57,974.68

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Solution

The fourth proportional to 61,959.88, 92,978.70 and 57,974.68 is: 86,998.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,959.88 : 92,978.70 = 57,974.68 : x
  2. Step 2: Convert to fraction form
    61,959.88/92,978.70 = 57,974.68/x
  3. Step 3: Cross multiply
    61,959.88x = 92,978.70 × 57,974.68
  4. Step 4: Simplify right side
    61,959.88x = 5,390,410,379.32
  5. Step 5: Solve for x
    x = 5,390,410,379.32/61,959.88
  6. Step 6: Final answer
    x = 86,998.40

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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.