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Finding the Fourth Proportional to 72,346.99, 99,839.54 and 40,082.30

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Solution

The fourth proportional to 72,346.99, 99,839.54 and 40,082.30 is: 55,313.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,346.99 : 99,839.54 = 40,082.30 : x
  2. Step 2: Convert to fraction form
    72,346.99/99,839.54 = 40,082.30/x
  3. Step 3: Cross multiply
    72,346.99x = 99,839.54 × 40,082.30
  4. Step 4: Simplify right side
    72,346.99x = 4,001,798,394.14
  5. Step 5: Solve for x
    x = 4,001,798,394.14/72,346.99
  6. Step 6: Final answer
    x = 55,313.96

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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.