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Finding the Fourth Proportional to 104,642.40, 156,704.40 and 83,906.40

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Solution

The fourth proportional to 104,642.40, 156,704.40 and 83,906.40 is: 125,651.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,642.40 : 156,704.40 = 83,906.40 : x
  2. Step 2: Convert to fraction form
    104,642.40/156,704.40 = 83,906.40/x
  3. Step 3: Cross multiply
    104,642.40x = 156,704.40 × 83,906.40
  4. Step 4: Simplify right side
    104,642.40x = 13,148,502,068.16
  5. Step 5: Solve for x
    x = 13,148,502,068.16/104,642.40
  6. Step 6: Final answer
    x = 125,651.76

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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.