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Finding the Fourth Proportional to 48,782.76, 67,311.04 and 30,865.20

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Solution

The fourth proportional to 48,782.76, 67,311.04 and 30,865.20 is: 42,588.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,782.76 : 67,311.04 = 30,865.20 : x
  2. Step 2: Convert to fraction form
    48,782.76/67,311.04 = 30,865.20/x
  3. Step 3: Cross multiply
    48,782.76x = 67,311.04 × 30,865.20
  4. Step 4: Simplify right side
    48,782.76x = 2,077,568,711.81
  5. Step 5: Solve for x
    x = 2,077,568,711.81/48,782.76
  6. Step 6: Final answer
    x = 42,588.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.