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Finding the Fourth Proportional to 260,090.55, 390,058.07 and 135,363.51

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Solution

The fourth proportional to 260,090.55, 390,058.07 and 135,363.51 is: 203,004.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,090.55 : 390,058.07 = 135,363.51 : x
  2. Step 2: Convert to fraction form
    260,090.55/390,058.07 = 135,363.51/x
  3. Step 3: Cross multiply
    260,090.55x = 390,058.07 × 135,363.51
  4. Step 4: Simplify right side
    260,090.55x = 52,799,628,782.21
  5. Step 5: Solve for x
    x = 52,799,628,782.21/260,090.55
  6. Step 6: Final answer
    x = 203,004.79

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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.