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Finding the Fourth Proportional to 142,657.81, 214,022.25 and 42,819.85

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Solution

The fourth proportional to 142,657.81, 214,022.25 and 42,819.85 is: 64,240.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,657.81 : 214,022.25 = 42,819.85 : x
  2. Step 2: Convert to fraction form
    142,657.81/214,022.25 = 42,819.85/x
  3. Step 3: Cross multiply
    142,657.81x = 214,022.25 × 42,819.85
  4. Step 4: Simplify right side
    142,657.81x = 9,164,400,641.66
  5. Step 5: Solve for x
    x = 9,164,400,641.66/142,657.81
  6. Step 6: Final answer
    x = 64,240.44

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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.