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Finding the Fourth Proportional to 158,408, 218,549.22 and 90,376.10

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Solution

The fourth proportional to 158,408, 218,549.22 and 90,376.10 is: 124,688.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,408 : 218,549.22 = 90,376.10 : x
  2. Step 2: Convert to fraction form
    158,408/218,549.22 = 90,376.10/x
  3. Step 3: Cross multiply
    158,408x = 218,549.22 × 90,376.10
  4. Step 4: Simplify right side
    158,408x = 19,751,626,161.64
  5. Step 5: Solve for x
    x = 19,751,626,161.64/158,408
  6. Step 6: Final answer
    x = 124,688.31

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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.