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Finding the Fourth Proportional to 76,853.70, 115,280.55 and 67,012.20

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Solution

The fourth proportional to 76,853.70, 115,280.55 and 67,012.20 is: 100,518.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,853.70 : 115,280.55 = 67,012.20 : x
  2. Step 2: Convert to fraction form
    76,853.70/115,280.55 = 67,012.20/x
  3. Step 3: Cross multiply
    76,853.70x = 115,280.55 × 67,012.20
  4. Step 4: Simplify right side
    76,853.70x = 7,725,203,272.71
  5. Step 5: Solve for x
    x = 7,725,203,272.71/76,853.70
  6. Step 6: Final answer
    x = 100,518.30

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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.