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Finding the Fourth Proportional to 215,692.47, 297,677.85 and 129,679.56

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Solution

The fourth proportional to 215,692.47, 297,677.85 and 129,679.56 is: 178,971.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,692.47 : 297,677.85 = 129,679.56 : x
  2. Step 2: Convert to fraction form
    215,692.47/297,677.85 = 129,679.56/x
  3. Step 3: Cross multiply
    215,692.47x = 297,677.85 × 129,679.56
  4. Step 4: Simplify right side
    215,692.47x = 38,602,732,609.75
  5. Step 5: Solve for x
    x = 38,602,732,609.75/215,692.47
  6. Step 6: Final answer
    x = 178,971.16

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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.