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Finding the Fourth Proportional to 75,068.43, 112,731.39 and 66,653.91

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Solution

The fourth proportional to 75,068.43, 112,731.39 and 66,653.91 is: 100,095.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,068.43 : 112,731.39 = 66,653.91 : x
  2. Step 2: Convert to fraction form
    75,068.43/112,731.39 = 66,653.91/x
  3. Step 3: Cross multiply
    75,068.43x = 112,731.39 × 66,653.91
  4. Step 4: Simplify right side
    75,068.43x = 7,513,987,923.23
  5. Step 5: Solve for x
    x = 7,513,987,923.23/75,068.43
  6. Step 6: Final answer
    x = 100,095.18

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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.