Home / 158,531.21-218,774.85-90,557.16

Finding the Fourth Proportional to 158,531.21, 218,774.85 and 90,557.16

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Solution

The fourth proportional to 158,531.21, 218,774.85 and 90,557.16 is: 124,969.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,531.21 : 218,774.85 = 90,557.16 : x
  2. Step 2: Convert to fraction form
    158,531.21/218,774.85 = 90,557.16/x
  3. Step 3: Cross multiply
    158,531.21x = 218,774.85 × 90,557.16
  4. Step 4: Simplify right side
    158,531.21x = 19,811,629,095.43
  5. Step 5: Solve for x
    x = 19,811,629,095.43/158,531.21
  6. Step 6: Final answer
    x = 124,969.90

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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.