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Finding the Fourth Proportional to 319,092.60, 478,703.70 and 108,751.80

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Solution

The fourth proportional to 319,092.60, 478,703.70 and 108,751.80 is: 163,149.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,092.60 : 478,703.70 = 108,751.80 : x
  2. Step 2: Convert to fraction form
    319,092.60/478,703.70 = 108,751.80/x
  3. Step 3: Cross multiply
    319,092.60x = 478,703.70 × 108,751.80
  4. Step 4: Simplify right side
    319,092.60x = 52,059,889,041.66
  5. Step 5: Solve for x
    x = 52,059,889,041.66/319,092.60
  6. Step 6: Final answer
    x = 163,149.78

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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.