Home / 100,670.46-138,925.32-55,349.22

Finding the Fourth Proportional to 100,670.46, 138,925.32 and 55,349.22

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Solution

The fourth proportional to 100,670.46, 138,925.32 and 55,349.22 is: 76,381.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,670.46 : 138,925.32 = 55,349.22 : x
  2. Step 2: Convert to fraction form
    100,670.46/138,925.32 = 55,349.22/x
  3. Step 3: Cross multiply
    100,670.46x = 138,925.32 × 55,349.22
  4. Step 4: Simplify right side
    100,670.46x = 7,689,408,100.25
  5. Step 5: Solve for x
    x = 7,689,408,100.25/100,670.46
  6. Step 6: Final answer
    x = 76,381.97

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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.