Home / 129,788.31-179,107.52-72,427.03

Finding the Fourth Proportional to 129,788.31, 179,107.52 and 72,427.03

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Solution

The fourth proportional to 129,788.31, 179,107.52 and 72,427.03 is: 99,949.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,788.31 : 179,107.52 = 72,427.03 : x
  2. Step 2: Convert to fraction form
    129,788.31/179,107.52 = 72,427.03/x
  3. Step 3: Cross multiply
    129,788.31x = 179,107.52 × 72,427.03
  4. Step 4: Simplify right side
    129,788.31x = 12,972,225,457.56
  5. Step 5: Solve for x
    x = 12,972,225,457.56/129,788.31
  6. Step 6: Final answer
    x = 99,949.11

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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.