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Finding the Fourth Proportional to 207,155.98, 285,897.18 and 126,630.64

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Solution

The fourth proportional to 207,155.98, 285,897.18 and 126,630.64 is: 174,763.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,155.98 : 285,897.18 = 126,630.64 : x
  2. Step 2: Convert to fraction form
    207,155.98/285,897.18 = 126,630.64/x
  3. Step 3: Cross multiply
    207,155.98x = 285,897.18 × 126,630.64
  4. Step 4: Simplify right side
    207,155.98x = 36,203,342,877.60
  5. Step 5: Solve for x
    x = 36,203,342,877.60/207,155.98
  6. Step 6: Final answer
    x = 174,763.69

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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.