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Finding the Fourth Proportional to 279,132.71, 418,636.18 and 79,448.67

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Solution

The fourth proportional to 279,132.71, 418,636.18 and 79,448.67 is: 119,155.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,132.71 : 418,636.18 = 79,448.67 : x
  2. Step 2: Convert to fraction form
    279,132.71/418,636.18 = 79,448.67/x
  3. Step 3: Cross multiply
    279,132.71x = 418,636.18 × 79,448.67
  4. Step 4: Simplify right side
    279,132.71x = 33,260,087,814.19
  5. Step 5: Solve for x
    x = 33,260,087,814.19/279,132.71
  6. Step 6: Final answer
    x = 119,155.11

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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.