Home / 210,521.91-290,522.28-115,028.61

Finding the Fourth Proportional to 210,521.91, 290,522.28 and 115,028.61

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Solution

The fourth proportional to 210,521.91, 290,522.28 and 115,028.61 is: 158,740.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,521.91 : 290,522.28 = 115,028.61 : x
  2. Step 2: Convert to fraction form
    210,521.91/290,522.28 = 115,028.61/x
  3. Step 3: Cross multiply
    210,521.91x = 290,522.28 × 115,028.61
  4. Step 4: Simplify right side
    210,521.91x = 33,418,374,042.43
  5. Step 5: Solve for x
    x = 33,418,374,042.43/210,521.91
  6. Step 6: Final answer
    x = 158,740.60

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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.