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Finding the Fourth Proportional to 258,417.36, 387,626.04 and 80,938.26

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Solution

The fourth proportional to 258,417.36, 387,626.04 and 80,938.26 is: 121,407.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,417.36 : 387,626.04 = 80,938.26 : x
  2. Step 2: Convert to fraction form
    258,417.36/387,626.04 = 80,938.26/x
  3. Step 3: Cross multiply
    258,417.36x = 387,626.04 × 80,938.26
  4. Step 4: Simplify right side
    258,417.36x = 31,373,777,208.29
  5. Step 5: Solve for x
    x = 31,373,777,208.29/258,417.36
  6. Step 6: Final answer
    x = 121,407.39

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1.5x scale

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.