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Finding the Fourth Proportional to 248,607.78, 343,078.11 and 135,430.26

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Solution

The fourth proportional to 248,607.78, 343,078.11 and 135,430.26 is: 186,893.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,607.78 : 343,078.11 = 135,430.26 : x
  2. Step 2: Convert to fraction form
    248,607.78/343,078.11 = 135,430.26/x
  3. Step 3: Cross multiply
    248,607.78x = 343,078.11 × 135,430.26
  4. Step 4: Simplify right side
    248,607.78x = 46,463,157,637.61
  5. Step 5: Solve for x
    x = 46,463,157,637.61/248,607.78
  6. Step 6: Final answer
    x = 186,893.42

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1.5x scale

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.