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Finding the Fourth Proportional to 258,530.80, 387,666.60 and 118,130.80

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Solution

The fourth proportional to 258,530.80, 387,666.60 and 118,130.80 is: 177,136.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,530.80 : 387,666.60 = 118,130.80 : x
  2. Step 2: Convert to fraction form
    258,530.80/387,666.60 = 118,130.80/x
  3. Step 3: Cross multiply
    258,530.80x = 387,666.60 × 118,130.80
  4. Step 4: Simplify right side
    258,530.80x = 45,795,365,591.28
  5. Step 5: Solve for x
    x = 45,795,365,591.28/258,530.80
  6. Step 6: Final answer
    x = 177,136.98

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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.