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Finding the Fourth Proportional to 86,674.10, 130,011.15 and 72,677.30

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Solution

The fourth proportional to 86,674.10, 130,011.15 and 72,677.30 is: 109,015.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,674.10 : 130,011.15 = 72,677.30 : x
  2. Step 2: Convert to fraction form
    86,674.10/130,011.15 = 72,677.30/x
  3. Step 3: Cross multiply
    86,674.10x = 130,011.15 × 72,677.30
  4. Step 4: Simplify right side
    86,674.10x = 9,448,859,351.90
  5. Step 5: Solve for x
    x = 9,448,859,351.90/86,674.10
  6. Step 6: Final answer
    x = 109,015.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.