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Finding the Fourth Proportional to 123,368.52, 170,248.42 and 66,779.88

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Solution

The fourth proportional to 123,368.52, 170,248.42 and 66,779.88 is: 92,156.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,368.52 : 170,248.42 = 66,779.88 : x
  2. Step 2: Convert to fraction form
    123,368.52/170,248.42 = 66,779.88/x
  3. Step 3: Cross multiply
    123,368.52x = 170,248.42 × 66,779.88
  4. Step 4: Simplify right side
    123,368.52x = 11,369,169,057.79
  5. Step 5: Solve for x
    x = 11,369,169,057.79/123,368.52
  6. Step 6: Final answer
    x = 92,156.16

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1.5x scale

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.