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Finding the Fourth Proportional to 61,309.31, 91,964.03 and 21,325.55

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Solution

The fourth proportional to 61,309.31, 91,964.03 and 21,325.55 is: 31,988.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,309.31 : 91,964.03 = 21,325.55 : x
  2. Step 2: Convert to fraction form
    61,309.31/91,964.03 = 21,325.55/x
  3. Step 3: Cross multiply
    61,309.31x = 91,964.03 × 21,325.55
  4. Step 4: Simplify right side
    61,309.31x = 1,961,182,953.52
  5. Step 5: Solve for x
    x = 1,961,182,953.52/61,309.31
  6. Step 6: Final answer
    x = 31,988.34

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1.5x scale

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.