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Finding the Fourth Proportional to 61,327.80, 91,957 and 21,328.40

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Solution

The fourth proportional to 61,327.80, 91,957 and 21,328.40 is: 31,980.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,327.80 : 91,957 = 21,328.40 : x
  2. Step 2: Convert to fraction form
    61,327.80/91,957 = 21,328.40/x
  3. Step 3: Cross multiply
    61,327.80x = 91,957 × 21,328.40
  4. Step 4: Simplify right side
    61,327.80x = 1,961,295,678.80
  5. Step 5: Solve for x
    x = 1,961,295,678.80/61,327.80
  6. Step 6: Final answer
    x = 31,980.53

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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.