Home / 100,431.03-138,590.17-55,107.89

Finding the Fourth Proportional to 100,431.03, 138,590.17 and 55,107.89

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Solution

The fourth proportional to 100,431.03, 138,590.17 and 55,107.89 is: 76,046.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,431.03 : 138,590.17 = 55,107.89 : x
  2. Step 2: Convert to fraction form
    100,431.03/138,590.17 = 55,107.89/x
  3. Step 3: Cross multiply
    100,431.03x = 138,590.17 × 55,107.89
  4. Step 4: Simplify right side
    100,431.03x = 7,637,411,532.43
  5. Step 5: Solve for x
    x = 7,637,411,532.43/100,431.03
  6. Step 6: Final answer
    x = 76,046.33

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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.