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Finding the Fourth Proportional to 72,935.50, 100,651.08 and 39,401.50

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Solution

The fourth proportional to 72,935.50, 100,651.08 and 39,401.50 is: 54,374.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,935.50 : 100,651.08 = 39,401.50 : x
  2. Step 2: Convert to fraction form
    72,935.50/100,651.08 = 39,401.50/x
  3. Step 3: Cross multiply
    72,935.50x = 100,651.08 × 39,401.50
  4. Step 4: Simplify right side
    72,935.50x = 3,965,803,528.62
  5. Step 5: Solve for x
    x = 3,965,803,528.62/72,935.50
  6. Step 6: Final answer
    x = 54,374.12

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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.