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Finding the Fourth Proportional to 61,307.40, 91,961.10 and 21,865.80

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Solution

The fourth proportional to 61,307.40, 91,961.10 and 21,865.80 is: 32,798.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,307.40 : 91,961.10 = 21,865.80 : x
  2. Step 2: Convert to fraction form
    61,307.40/91,961.10 = 21,865.80/x
  3. Step 3: Cross multiply
    61,307.40x = 91,961.10 × 21,865.80
  4. Step 4: Simplify right side
    61,307.40x = 2,010,803,020.38
  5. Step 5: Solve for x
    x = 2,010,803,020.38/61,307.40
  6. Step 6: Final answer
    x = 32,798.70

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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.