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Finding the Fourth Proportional to 72,980.84, 100,713.71 and 39,446.84

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Solution

The fourth proportional to 72,980.84, 100,713.71 and 39,446.84 is: 54,436.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,980.84 : 100,713.71 = 39,446.84 : x
  2. Step 2: Convert to fraction form
    72,980.84/100,713.71 = 39,446.84/x
  3. Step 3: Cross multiply
    72,980.84x = 100,713.71 × 39,446.84
  4. Step 4: Simplify right side
    72,980.84x = 3,972,837,604.18
  5. Step 5: Solve for x
    x = 3,972,837,604.18/72,980.84
  6. Step 6: Final answer
    x = 54,436.72

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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.