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Finding the Fourth Proportional to 210,789.13, 316,187.80 and 77,600.83

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Solution

The fourth proportional to 210,789.13, 316,187.80 and 77,600.83 is: 116,402.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,789.13 : 316,187.80 = 77,600.83 : x
  2. Step 2: Convert to fraction form
    210,789.13/316,187.80 = 77,600.83/x
  3. Step 3: Cross multiply
    210,789.13x = 316,187.80 × 77,600.83
  4. Step 4: Simplify right side
    210,789.13x = 24,536,434,134.94
  5. Step 5: Solve for x
    x = 24,536,434,134.94/210,789.13
  6. Step 6: Final answer
    x = 116,402.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.