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Finding the Fourth Proportional to 113,086.64, 156,087.60 and 65,369.72

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Solution

The fourth proportional to 113,086.64, 156,087.60 and 65,369.72 is: 90,226.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,086.64 : 156,087.60 = 65,369.72 : x
  2. Step 2: Convert to fraction form
    113,086.64/156,087.60 = 65,369.72/x
  3. Step 3: Cross multiply
    113,086.64x = 156,087.60 × 65,369.72
  4. Step 4: Simplify right side
    113,086.64x = 10,203,402,707.47
  5. Step 5: Solve for x
    x = 10,203,402,707.47/113,086.64
  6. Step 6: Final answer
    x = 90,226.42

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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.