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Finding the Fourth Proportional to 104,431.56, 144,115.64 and 56,684.88

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Solution

The fourth proportional to 104,431.56, 144,115.64 and 56,684.88 is: 78,225.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,431.56 : 144,115.64 = 56,684.88 : x
  2. Step 2: Convert to fraction form
    104,431.56/144,115.64 = 56,684.88/x
  3. Step 3: Cross multiply
    104,431.56x = 144,115.64 × 56,684.88
  4. Step 4: Simplify right side
    104,431.56x = 8,169,177,759.52
  5. Step 5: Solve for x
    x = 8,169,177,759.52/104,431.56
  6. Step 6: Final answer
    x = 78,225.18

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1.5x scale

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.