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Finding the Fourth Proportional to 48,940.90, 73,411.35 and 45,139.30

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Solution

The fourth proportional to 48,940.90, 73,411.35 and 45,139.30 is: 67,708.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,940.90 : 73,411.35 = 45,139.30 : x
  2. Step 2: Convert to fraction form
    48,940.90/73,411.35 = 45,139.30/x
  3. Step 3: Cross multiply
    48,940.90x = 73,411.35 × 45,139.30
  4. Step 4: Simplify right side
    48,940.90x = 3,313,736,951.06
  5. Step 5: Solve for x
    x = 3,313,736,951.06/48,940.90
  6. Step 6: Final answer
    x = 67,708.95

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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.