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Finding the Fourth Proportional to 47,218.70, 70,828.07 and 45,168.72

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Solution

The fourth proportional to 47,218.70, 70,828.07 and 45,168.72 is: 67,753.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,218.70 : 70,828.07 = 45,168.72 : x
  2. Step 2: Convert to fraction form
    47,218.70/70,828.07 = 45,168.72/x
  3. Step 3: Cross multiply
    47,218.70x = 70,828.07 × 45,168.72
  4. Step 4: Simplify right side
    47,218.70x = 3,199,213,036.13
  5. Step 5: Solve for x
    x = 3,199,213,036.13/47,218.70
  6. Step 6: Final answer
    x = 67,753.10

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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.