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Finding the Fourth Proportional to 99,159.62, 136,814.01 and 56,709.86

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Solution

The fourth proportional to 99,159.62, 136,814.01 and 56,709.86 is: 78,244.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,159.62 : 136,814.01 = 56,709.86 : x
  2. Step 2: Convert to fraction form
    99,159.62/136,814.01 = 56,709.86/x
  3. Step 3: Cross multiply
    99,159.62x = 136,814.01 × 56,709.86
  4. Step 4: Simplify right side
    99,159.62x = 7,758,703,353.14
  5. Step 5: Solve for x
    x = 7,758,703,353.14/99,159.62
  6. Step 6: Final answer
    x = 78,244.59

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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.