Home / 100,670.09-138,925.68-55,348.39

Finding the Fourth Proportional to 100,670.09, 138,925.68 and 55,348.39

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Solution

The fourth proportional to 100,670.09, 138,925.68 and 55,348.39 is: 76,381.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,670.09 : 138,925.68 = 55,348.39 : x
  2. Step 2: Convert to fraction form
    100,670.09/138,925.68 = 55,348.39/x
  3. Step 3: Cross multiply
    100,670.09x = 138,925.68 × 55,348.39
  4. Step 4: Simplify right side
    100,670.09x = 7,689,311,746.28
  5. Step 5: Solve for x
    x = 7,689,311,746.28/100,670.09
  6. Step 6: Final answer
    x = 76,381.29

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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.