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Finding the Fourth Proportional to 151,063.98, 208,451.94 and 87,389.88

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Solution

The fourth proportional to 151,063.98, 208,451.94 and 87,389.88 is: 120,588.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,063.98 : 208,451.94 = 87,389.88 : x
  2. Step 2: Convert to fraction form
    151,063.98/208,451.94 = 87,389.88/x
  3. Step 3: Cross multiply
    151,063.98x = 208,451.94 × 87,389.88
  4. Step 4: Simplify right side
    151,063.98x = 18,216,590,022.37
  5. Step 5: Solve for x
    x = 18,216,590,022.37/151,063.98
  6. Step 6: Final answer
    x = 120,588.57

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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.