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Finding the Fourth Proportional to 143,596.60, 215,438.10 and 77,068.60

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Solution

The fourth proportional to 143,596.60, 215,438.10 and 77,068.60 is: 115,626.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,596.60 : 215,438.10 = 77,068.60 : x
  2. Step 2: Convert to fraction form
    143,596.60/215,438.10 = 77,068.60/x
  3. Step 3: Cross multiply
    143,596.60x = 215,438.10 × 77,068.60
  4. Step 4: Simplify right side
    143,596.60x = 16,603,512,753.66
  5. Step 5: Solve for x
    x = 16,603,512,753.66/143,596.60
  6. Step 6: Final answer
    x = 115,626.09

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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.