Home / 100,421.20-150,545.40-51,173.20

Finding the Fourth Proportional to 100,421.20, 150,545.40 and 51,173.20

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Solution

The fourth proportional to 100,421.20, 150,545.40 and 51,173.20 is: 76,715.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,421.20 : 150,545.40 = 51,173.20 : x
  2. Step 2: Convert to fraction form
    100,421.20/150,545.40 = 51,173.20/x
  3. Step 3: Cross multiply
    100,421.20x = 150,545.40 × 51,173.20
  4. Step 4: Simplify right side
    100,421.20x = 7,703,889,863.28
  5. Step 5: Solve for x
    x = 7,703,889,863.28/100,421.20
  6. Step 6: Final answer
    x = 76,715.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.