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Finding the Fourth Proportional to 67,689.42, 101,547.09 and 20,934.06

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Solution

The fourth proportional to 67,689.42, 101,547.09 and 20,934.06 is: 31,405.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,689.42 : 101,547.09 = 20,934.06 : x
  2. Step 2: Convert to fraction form
    67,689.42/101,547.09 = 20,934.06/x
  3. Step 3: Cross multiply
    67,689.42x = 101,547.09 × 20,934.06
  4. Step 4: Simplify right side
    67,689.42x = 2,125,792,874.89
  5. Step 5: Solve for x
    x = 2,125,792,874.89/67,689.42
  6. Step 6: Final answer
    x = 31,405.10

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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.