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Finding the Fourth Proportional to 215,692.10, 323,538.98 and 65,931.80

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Solution

The fourth proportional to 215,692.10, 323,538.98 and 65,931.80 is: 98,897.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,692.10 : 323,538.98 = 65,931.80 : x
  2. Step 2: Convert to fraction form
    215,692.10/323,538.98 = 65,931.80/x
  3. Step 3: Cross multiply
    215,692.10x = 323,538.98 × 65,931.80
  4. Step 4: Simplify right side
    215,692.10x = 21,331,507,321.56
  5. Step 5: Solve for x
    x = 21,331,507,321.56/215,692.10
  6. Step 6: Final answer
    x = 98,897.95

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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.