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Finding the Fourth Proportional to 45,985.52, 68,955.71 and 20,692.87

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Solution

The fourth proportional to 45,985.52, 68,955.71 and 20,692.87 is: 31,029.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,985.52 : 68,955.71 = 20,692.87 : x
  2. Step 2: Convert to fraction form
    45,985.52/68,955.71 = 20,692.87/x
  3. Step 3: Cross multiply
    45,985.52x = 68,955.71 × 20,692.87
  4. Step 4: Simplify right side
    45,985.52x = 1,426,891,266.93
  5. Step 5: Solve for x
    x = 1,426,891,266.93/45,985.52
  6. Step 6: Final answer
    x = 31,029.14

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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.