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Finding the Fourth Proportional to 248,897.40, 343,478.64 and 135,720.15

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Solution

The fourth proportional to 248,897.40, 343,478.64 and 135,720.15 is: 187,293.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,897.40 : 343,478.64 = 135,720.15 : x
  2. Step 2: Convert to fraction form
    248,897.40/343,478.64 = 135,720.15/x
  3. Step 3: Cross multiply
    248,897.40x = 343,478.64 × 135,720.15
  4. Step 4: Simplify right side
    248,897.40x = 46,616,972,542.60
  5. Step 5: Solve for x
    x = 46,616,972,542.60/248,897.40
  6. Step 6: Final answer
    x = 187,293.93

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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.