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Finding the Fourth Proportional to 70,891.50, 106,355.70 and 26,521.72

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Solution

The fourth proportional to 70,891.50, 106,355.70 and 26,521.72 is: 39,789.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,891.50 : 106,355.70 = 26,521.72 : x
  2. Step 2: Convert to fraction form
    70,891.50/106,355.70 = 26,521.72/x
  3. Step 3: Cross multiply
    70,891.50x = 106,355.70 × 26,521.72
  4. Step 4: Simplify right side
    70,891.50x = 2,820,736,095.80
  5. Step 5: Solve for x
    x = 2,820,736,095.80/70,891.50
  6. Step 6: Final answer
    x = 39,789.48

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1.5x scale

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.