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Finding the Fourth Proportional to 123,692.40, 170,816.76 and 85,549.68

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Solution

The fourth proportional to 123,692.40, 170,816.76 and 85,549.68 is: 118,142.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,692.40 : 170,816.76 = 85,549.68 : x
  2. Step 2: Convert to fraction form
    123,692.40/170,816.76 = 85,549.68/x
  3. Step 3: Cross multiply
    123,692.40x = 170,816.76 × 85,549.68
  4. Step 4: Simplify right side
    123,692.40x = 14,613,319,156.64
  5. Step 5: Solve for x
    x = 14,613,319,156.64/123,692.40
  6. Step 6: Final answer
    x = 118,142.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.