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Finding the Fourth Proportional to 113,319, 156,380.22 and 63,018

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Solution

The fourth proportional to 113,319, 156,380.22 and 63,018 is: 86,964.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,319 : 156,380.22 = 63,018 : x
  2. Step 2: Convert to fraction form
    113,319/156,380.22 = 63,018/x
  3. Step 3: Cross multiply
    113,319x = 156,380.22 × 63,018
  4. Step 4: Simplify right side
    113,319x = 9,854,768,703.96
  5. Step 5: Solve for x
    x = 9,854,768,703.96/113,319
  6. Step 6: Final answer
    x = 86,964.84

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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.