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Finding the Fourth Proportional to 113,590.40, 156,755.39 and 65,872.08

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Solution

The fourth proportional to 113,590.40, 156,755.39 and 65,872.08 is: 90,903.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,590.40 : 156,755.39 = 65,872.08 : x
  2. Step 2: Convert to fraction form
    113,590.40/156,755.39 = 65,872.08/x
  3. Step 3: Cross multiply
    113,590.40x = 156,755.39 × 65,872.08
  4. Step 4: Simplify right side
    113,590.40x = 10,325,803,261.15
  5. Step 5: Solve for x
    x = 10,325,803,261.15/113,590.40
  6. Step 6: Final answer
    x = 90,903.84

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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.