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Finding the Fourth Proportional to 123,547.56, 170,491.05 and 66,957.72

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Solution

The fourth proportional to 123,547.56, 170,491.05 and 66,957.72 is: 92,399.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,547.56 : 170,491.05 = 66,957.72 : x
  2. Step 2: Convert to fraction form
    123,547.56/170,491.05 = 66,957.72/x
  3. Step 3: Cross multiply
    123,547.56x = 170,491.05 × 66,957.72
  4. Step 4: Simplify right side
    123,547.56x = 11,415,691,988.41
  5. Step 5: Solve for x
    x = 11,415,691,988.41/123,547.56
  6. Step 6: Final answer
    x = 92,399.17

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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.