Home / 103,175.78-142,441.56-78,932.07

Finding the Fourth Proportional to 103,175.78, 142,441.56 and 78,932.07

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Solution

The fourth proportional to 103,175.78, 142,441.56 and 78,932.07 is: 108,971.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,175.78 : 142,441.56 = 78,932.07 : x
  2. Step 2: Convert to fraction form
    103,175.78/142,441.56 = 78,932.07/x
  3. Step 3: Cross multiply
    103,175.78x = 142,441.56 × 78,932.07
  4. Step 4: Simplify right side
    103,175.78x = 11,243,207,184.83
  5. Step 5: Solve for x
    x = 11,243,207,184.83/103,175.78
  6. Step 6: Final answer
    x = 108,971.39

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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.