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Finding the Fourth Proportional to 218,705.37, 301,819.81 and 128,052.86

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Solution

The fourth proportional to 218,705.37, 301,819.81 and 128,052.86 is: 176,716.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,705.37 : 301,819.81 = 128,052.86 : x
  2. Step 2: Convert to fraction form
    218,705.37/301,819.81 = 128,052.86/x
  3. Step 3: Cross multiply
    218,705.37x = 301,819.81 × 128,052.86
  4. Step 4: Simplify right side
    218,705.37x = 38,648,889,875.16
  5. Step 5: Solve for x
    x = 38,648,889,875.16/218,705.37
  6. Step 6: Final answer
    x = 176,716.69

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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.