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Finding the Fourth Proportional to 113,335.76, 156,408.60 and 65,579.84

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Solution

The fourth proportional to 113,335.76, 156,408.60 and 65,579.84 is: 90,503.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,335.76 : 156,408.60 = 65,579.84 : x
  2. Step 2: Convert to fraction form
    113,335.76/156,408.60 = 65,579.84/x
  3. Step 3: Cross multiply
    113,335.76x = 156,408.60 × 65,579.84
  4. Step 4: Simplify right side
    113,335.76x = 10,257,250,962.62
  5. Step 5: Solve for x
    x = 10,257,250,962.62/113,335.76
  6. Step 6: Final answer
    x = 90,503.22

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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.