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Finding the Fourth Proportional to 61,038, 91,557.57 and 21,601.80

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Solution

The fourth proportional to 61,038, 91,557.57 and 21,601.80 is: 32,402.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,038 : 91,557.57 = 21,601.80 : x
  2. Step 2: Convert to fraction form
    61,038/91,557.57 = 21,601.80/x
  3. Step 3: Cross multiply
    61,038x = 91,557.57 × 21,601.80
  4. Step 4: Simplify right side
    61,038x = 1,977,808,315.63
  5. Step 5: Solve for x
    x = 1,977,808,315.63/61,038
  6. Step 6: Final answer
    x = 32,402.90

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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.