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Finding the Fourth Proportional to 81,674.28, 112,710.42 and 47,706.12

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Solution

The fourth proportional to 81,674.28, 112,710.42 and 47,706.12 is: 65,834.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,674.28 : 112,710.42 = 47,706.12 : x
  2. Step 2: Convert to fraction form
    81,674.28/112,710.42 = 47,706.12/x
  3. Step 3: Cross multiply
    81,674.28x = 112,710.42 × 47,706.12
  4. Step 4: Simplify right side
    81,674.28x = 5,376,976,821.77
  5. Step 5: Solve for x
    x = 5,376,976,821.77/81,674.28
  6. Step 6: Final answer
    x = 65,834.40

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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.