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Finding the Fourth Proportional to 223,710.61, 308,720.69 and 123,108.61

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Solution

The fourth proportional to 223,710.61, 308,720.69 and 123,108.61 is: 169,889.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,710.61 : 308,720.69 = 123,108.61 : x
  2. Step 2: Convert to fraction form
    223,710.61/308,720.69 = 123,108.61/x
  3. Step 3: Cross multiply
    223,710.61x = 308,720.69 × 123,108.61
  4. Step 4: Simplify right side
    223,710.61x = 38,006,175,023.55
  5. Step 5: Solve for x
    x = 38,006,175,023.55/223,710.61
  6. Step 6: Final answer
    x = 169,889.91

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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.