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Finding the Fourth Proportional to 69,047.40, 103,311.90 and 45,719.40

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Solution

The fourth proportional to 69,047.40, 103,311.90 and 45,719.40 is: 68,407.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,047.40 : 103,311.90 = 45,719.40 : x
  2. Step 2: Convert to fraction form
    69,047.40/103,311.90 = 45,719.40/x
  3. Step 3: Cross multiply
    69,047.40x = 103,311.90 × 45,719.40
  4. Step 4: Simplify right side
    69,047.40x = 4,723,358,080.86
  5. Step 5: Solve for x
    x = 4,723,358,080.86/69,047.40
  6. Step 6: Final answer
    x = 68,407.47

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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.