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Finding the Fourth Proportional to 79,408.74, 109,510.92 and 53,953.20

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Solution

The fourth proportional to 79,408.74, 109,510.92 and 53,953.20 is: 74,405.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,408.74 : 109,510.92 = 53,953.20 : x
  2. Step 2: Convert to fraction form
    79,408.74/109,510.92 = 53,953.20/x
  3. Step 3: Cross multiply
    79,408.74x = 109,510.92 × 53,953.20
  4. Step 4: Simplify right side
    79,408.74x = 5,908,464,568.94
  5. Step 5: Solve for x
    x = 5,908,464,568.94/79,408.74
  6. Step 6: Final answer
    x = 74,405.72

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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.