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Finding the Fourth Proportional to 106,872.72, 147,484.44 and 64,420.08

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Solution

The fourth proportional to 106,872.72, 147,484.44 and 64,420.08 is: 88,899.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,872.72 : 147,484.44 = 64,420.08 : x
  2. Step 2: Convert to fraction form
    106,872.72/147,484.44 = 64,420.08/x
  3. Step 3: Cross multiply
    106,872.72x = 147,484.44 × 64,420.08
  4. Step 4: Simplify right side
    106,872.72x = 9,500,959,423.56
  5. Step 5: Solve for x
    x = 9,500,959,423.56/106,872.72
  6. Step 6: Final answer
    x = 88,899.76

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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.