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Finding the Fourth Proportional to 253,987.15, 350,488.78 and 145,070.09

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Solution

The fourth proportional to 253,987.15, 350,488.78 and 145,070.09 is: 200,189.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,987.15 : 350,488.78 = 145,070.09 : x
  2. Step 2: Convert to fraction form
    253,987.15/350,488.78 = 145,070.09/x
  3. Step 3: Cross multiply
    253,987.15x = 350,488.78 × 145,070.09
  4. Step 4: Simplify right side
    253,987.15x = 50,845,438,858.59
  5. Step 5: Solve for x
    x = 50,845,438,858.59/253,987.15
  6. Step 6: Final answer
    x = 200,189.02

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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.