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Finding the Fourth Proportional to 78,197.91, 107,903.45 and 55,528.64

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Solution

The fourth proportional to 78,197.91, 107,903.45 and 55,528.64 is: 76,622.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,197.91 : 107,903.45 = 55,528.64 : x
  2. Step 2: Convert to fraction form
    78,197.91/107,903.45 = 55,528.64/x
  3. Step 3: Cross multiply
    78,197.91x = 107,903.45 × 55,528.64
  4. Step 4: Simplify right side
    78,197.91x = 5,991,731,012.65
  5. Step 5: Solve for x
    x = 5,991,731,012.65/78,197.91
  6. Step 6: Final answer
    x = 76,622.65

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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.