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Finding the Fourth Proportional to 525,879.74, 788,819.63 and 126,520.52

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Solution

The fourth proportional to 525,879.74, 788,819.63 and 126,520.52 is: 189,780.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,879.74 : 788,819.63 = 126,520.52 : x
  2. Step 2: Convert to fraction form
    525,879.74/788,819.63 = 126,520.52/x
  3. Step 3: Cross multiply
    525,879.74x = 788,819.63 × 126,520.52
  4. Step 4: Simplify right side
    525,879.74x = 99,801,865,197.11
  5. Step 5: Solve for x
    x = 99,801,865,197.11/525,879.74
  6. Step 6: Final answer
    x = 189,780.78

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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.