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Finding the Fourth Proportional to 123,282.95, 170,128.80 and 68,835.96

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Solution

The fourth proportional to 123,282.95, 170,128.80 and 68,835.96 is: 94,992.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,282.95 : 170,128.80 = 68,835.96 : x
  2. Step 2: Convert to fraction form
    123,282.95/170,128.80 = 68,835.96/x
  3. Step 3: Cross multiply
    123,282.95x = 170,128.80 × 68,835.96
  4. Step 4: Simplify right side
    123,282.95x = 11,710,979,271.65
  5. Step 5: Solve for x
    x = 11,710,979,271.65/123,282.95
  6. Step 6: Final answer
    x = 94,992.70

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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.