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Finding the Fourth Proportional to 47,278.40, 70,917.60 and 43,123.10

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Solution

The fourth proportional to 47,278.40, 70,917.60 and 43,123.10 is: 64,684.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,278.40 : 70,917.60 = 43,123.10 : x
  2. Step 2: Convert to fraction form
    47,278.40/70,917.60 = 43,123.10/x
  3. Step 3: Cross multiply
    47,278.40x = 70,917.60 × 43,123.10
  4. Step 4: Simplify right side
    47,278.40x = 3,058,186,756.56
  5. Step 5: Solve for x
    x = 3,058,186,756.56/47,278.40
  6. Step 6: Final answer
    x = 64,684.65

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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.