Home / 138,398.21-191,003.63-84,718.70

Finding the Fourth Proportional to 138,398.21, 191,003.63 and 84,718.70

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Solution

The fourth proportional to 138,398.21, 191,003.63 and 84,718.70 is: 116,920.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,398.21 : 191,003.63 = 84,718.70 : x
  2. Step 2: Convert to fraction form
    138,398.21/191,003.63 = 84,718.70/x
  3. Step 3: Cross multiply
    138,398.21x = 191,003.63 × 84,718.70
  4. Step 4: Simplify right side
    138,398.21x = 16,181,577,850.27
  5. Step 5: Solve for x
    x = 16,181,577,850.27/138,398.21
  6. Step 6: Final answer
    x = 116,920.43

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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.