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Finding the Fourth Proportional to 123,497.11, 170,423.79 and 69,780.98

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Solution

The fourth proportional to 123,497.11, 170,423.79 and 69,780.98 is: 96,296.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,497.11 : 170,423.79 = 69,780.98 : x
  2. Step 2: Convert to fraction form
    123,497.11/170,423.79 = 69,780.98/x
  3. Step 3: Cross multiply
    123,497.11x = 170,423.79 × 69,780.98
  4. Step 4: Simplify right side
    123,497.11x = 11,892,339,081.51
  5. Step 5: Solve for x
    x = 11,892,339,081.51/123,497.11
  6. Step 6: Final answer
    x = 96,296.50

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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.