Home / 100,857.12-139,186.62-55,537.08

Finding the Fourth Proportional to 100,857.12, 139,186.62 and 55,537.08

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Solution

The fourth proportional to 100,857.12, 139,186.62 and 55,537.08 is: 76,643.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,857.12 : 139,186.62 = 55,537.08 : x
  2. Step 2: Convert to fraction form
    100,857.12/139,186.62 = 55,537.08/x
  3. Step 3: Cross multiply
    100,857.12x = 139,186.62 × 55,537.08
  4. Step 4: Simplify right side
    100,857.12x = 7,730,018,449.87
  5. Step 5: Solve for x
    x = 7,730,018,449.87/100,857.12
  6. Step 6: Final answer
    x = 76,643.26

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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.