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Finding the Fourth Proportional to 123,188.16, 183,510.96 and 115,538.88

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Solution

The fourth proportional to 123,188.16, 183,510.96 and 115,538.88 is: 172,115.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,188.16 : 183,510.96 = 115,538.88 : x
  2. Step 2: Convert to fraction form
    123,188.16/183,510.96 = 115,538.88/x
  3. Step 3: Cross multiply
    123,188.16x = 183,510.96 × 115,538.88
  4. Step 4: Simplify right side
    123,188.16x = 21,202,650,786.12
  5. Step 5: Solve for x
    x = 21,202,650,786.12/123,188.16
  6. Step 6: Final answer
    x = 172,115.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.