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Finding the Fourth Proportional to 72,855.56, 109,246.80 and 35,392.16

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Solution

The fourth proportional to 72,855.56, 109,246.80 and 35,392.16 is: 53,070.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,855.56 : 109,246.80 = 35,392.16 : x
  2. Step 2: Convert to fraction form
    72,855.56/109,246.80 = 35,392.16/x
  3. Step 3: Cross multiply
    72,855.56x = 109,246.80 × 35,392.16
  4. Step 4: Simplify right side
    72,855.56x = 3,866,480,225.09
  5. Step 5: Solve for x
    x = 3,866,480,225.09/72,855.56
  6. Step 6: Final answer
    x = 53,070.49

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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.