Home / 129,441.28-178,628.60-72,852.65

Finding the Fourth Proportional to 129,441.28, 178,628.60 and 72,852.65

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Solution

The fourth proportional to 129,441.28, 178,628.60 and 72,852.65 is: 100,536.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,441.28 : 178,628.60 = 72,852.65 : x
  2. Step 2: Convert to fraction form
    129,441.28/178,628.60 = 72,852.65/x
  3. Step 3: Cross multiply
    129,441.28x = 178,628.60 × 72,852.65
  4. Step 4: Simplify right side
    129,441.28x = 13,013,566,511.53
  5. Step 5: Solve for x
    x = 13,013,566,511.53/129,441.28
  6. Step 6: Final answer
    x = 100,536.45

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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.