Home / 129,310,257.70-193,965,386.55-115,280,215.30

Finding the Fourth Proportional to 129,310,257.70, 193,965,386.55 and 115,280,215.30

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Solution

The fourth proportional to 129,310,257.70, 193,965,386.55 and 115,280,215.30 is: 172,920,322.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,310,257.70 : 193,965,386.55 = 115,280,215.30 : x
  2. Step 2: Convert to fraction form
    129,310,257.70/193,965,386.55 = 115,280,215.30/x
  3. Step 3: Cross multiply
    129,310,257.70x = 193,965,386.55 × 115,280,215.30
  4. Step 4: Simplify right side
    129,310,257.70x = 22,360,371,522,231,724
  5. Step 5: Solve for x
    x = 22,360,371,522,231,724/129,310,257.70
  6. Step 6: Final answer
    x = 172,920,322.95

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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.