Home / 129,620.85-178,870.56-72,266.48

Finding the Fourth Proportional to 129,620.85, 178,870.56 and 72,266.48

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Solution

The fourth proportional to 129,620.85, 178,870.56 and 72,266.48 is: 99,724.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,620.85 : 178,870.56 = 72,266.48 : x
  2. Step 2: Convert to fraction form
    129,620.85/178,870.56 = 72,266.48/x
  3. Step 3: Cross multiply
    129,620.85x = 178,870.56 × 72,266.48
  4. Step 4: Simplify right side
    129,620.85x = 12,926,344,852.48
  5. Step 5: Solve for x
    x = 12,926,344,852.48/129,620.85
  6. Step 6: Final answer
    x = 99,724.27

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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.