Home / 138,558.75-191,211.08-100,864.59

Finding the Fourth Proportional to 138,558.75, 191,211.08 and 100,864.59

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Solution

The fourth proportional to 138,558.75, 191,211.08 and 100,864.59 is: 139,193.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,558.75 : 191,211.08 = 100,864.59 : x
  2. Step 2: Convert to fraction form
    138,558.75/191,211.08 = 100,864.59/x
  3. Step 3: Cross multiply
    138,558.75x = 191,211.08 × 100,864.59
  4. Step 4: Simplify right side
    138,558.75x = 19,286,426,683.33
  5. Step 5: Solve for x
    x = 19,286,426,683.33/138,558.75
  6. Step 6: Final answer
    x = 139,193.13

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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.