Home / 81,035.42-121,552.16-21,058.61

Finding the Fourth Proportional to 81,035.42, 121,552.16 and 21,058.61

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Solution

The fourth proportional to 81,035.42, 121,552.16 and 21,058.61 is: 31,587.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,035.42 : 121,552.16 = 21,058.61 : x
  2. Step 2: Convert to fraction form
    81,035.42/121,552.16 = 21,058.61/x
  3. Step 3: Cross multiply
    81,035.42x = 121,552.16 × 21,058.61
  4. Step 4: Simplify right side
    81,035.42x = 2,559,718,819.04
  5. Step 5: Solve for x
    x = 2,559,718,819.04/81,035.42
  6. Step 6: Final answer
    x = 31,587.66

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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.