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Finding the Fourth Proportional to 72,930.80, 100,391.64 and 62,892.56

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Solution

The fourth proportional to 72,930.80, 100,391.64 and 62,892.56 is: 86,573.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,930.80 : 100,391.64 = 62,892.56 : x
  2. Step 2: Convert to fraction form
    72,930.80/100,391.64 = 62,892.56/x
  3. Step 3: Cross multiply
    72,930.80x = 100,391.64 × 62,892.56
  4. Step 4: Simplify right side
    72,930.80x = 6,313,887,242.20
  5. Step 5: Solve for x
    x = 6,313,887,242.20/72,930.80
  6. Step 6: Final answer
    x = 86,573.67

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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.