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Finding the Fourth Proportional to 104,979.71, 144,874.76 and 64,720.07

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Solution

The fourth proportional to 104,979.71, 144,874.76 and 64,720.07 is: 89,315.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,979.71 : 144,874.76 = 64,720.07 : x
  2. Step 2: Convert to fraction form
    104,979.71/144,874.76 = 64,720.07/x
  3. Step 3: Cross multiply
    104,979.71x = 144,874.76 × 64,720.07
  4. Step 4: Simplify right side
    104,979.71x = 9,376,304,608.43
  5. Step 5: Solve for x
    x = 9,376,304,608.43/104,979.71
  6. Step 6: Final answer
    x = 89,315.40

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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.