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Finding the Fourth Proportional to 123,368.94, 170,248.95 and 66,780.54

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Solution

The fourth proportional to 123,368.94, 170,248.95 and 66,780.54 is: 92,157.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,368.94 : 170,248.95 = 66,780.54 : x
  2. Step 2: Convert to fraction form
    123,368.94/170,248.95 = 66,780.54/x
  3. Step 3: Cross multiply
    123,368.94x = 170,248.95 × 66,780.54
  4. Step 4: Simplify right side
    123,368.94x = 11,369,316,815.43
  5. Step 5: Solve for x
    x = 11,369,316,815.43/123,368.94
  6. Step 6: Final answer
    x = 92,157.04

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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.