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Finding the Fourth Proportional to 312,479.04, 468,707.76 and 87,841.20

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Solution

The fourth proportional to 312,479.04, 468,707.76 and 87,841.20 is: 131,758.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,479.04 : 468,707.76 = 87,841.20 : x
  2. Step 2: Convert to fraction form
    312,479.04/468,707.76 = 87,841.20/x
  3. Step 3: Cross multiply
    312,479.04x = 468,707.76 × 87,841.20
  4. Step 4: Simplify right side
    312,479.04x = 41,171,852,087.71
  5. Step 5: Solve for x
    x = 41,171,852,087.71/312,479.04
  6. Step 6: Final answer
    x = 131,758.76

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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.