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Finding the Fourth Proportional to 215,402.88, 323,079.60 and 57,643.62

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Solution

The fourth proportional to 215,402.88, 323,079.60 and 57,643.62 is: 86,458.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,402.88 : 323,079.60 = 57,643.62 : x
  2. Step 2: Convert to fraction form
    215,402.88/323,079.60 = 57,643.62/x
  3. Step 3: Cross multiply
    215,402.88x = 323,079.60 × 57,643.62
  4. Step 4: Simplify right side
    215,402.88x = 18,623,477,692.15
  5. Step 5: Solve for x
    x = 18,623,477,692.15/215,402.88
  6. Step 6: Final answer
    x = 86,458.81

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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.