Home / 129,759.36-179,074.98-72,411.36

Finding the Fourth Proportional to 129,759.36, 179,074.98 and 72,411.36

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Solution

The fourth proportional to 129,759.36, 179,074.98 and 72,411.36 is: 99,931.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,759.36 : 179,074.98 = 72,411.36 : x
  2. Step 2: Convert to fraction form
    129,759.36/179,074.98 = 72,411.36/x
  3. Step 3: Cross multiply
    129,759.36x = 179,074.98 × 72,411.36
  4. Step 4: Simplify right side
    129,759.36x = 12,967,062,843.77
  5. Step 5: Solve for x
    x = 12,967,062,843.77/129,759.36
  6. Step 6: Final answer
    x = 99,931.62

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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.