Home / 100,511.28-150,783.12-30,384.72

Finding the Fourth Proportional to 100,511.28, 150,783.12 and 30,384.72

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Solution

The fourth proportional to 100,511.28, 150,783.12 and 30,384.72 is: 45,581.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,511.28 : 150,783.12 = 30,384.72 : x
  2. Step 2: Convert to fraction form
    100,511.28/150,783.12 = 30,384.72/x
  3. Step 3: Cross multiply
    100,511.28x = 150,783.12 × 30,384.72
  4. Step 4: Simplify right side
    100,511.28x = 4,581,502,881.93
  5. Step 5: Solve for x
    x = 4,581,502,881.93/100,511.28
  6. Step 6: Final answer
    x = 45,581.98

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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.