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Finding the Fourth Proportional to 70,720.70, 106,086.51 and 28,599.08

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Solution

The fourth proportional to 70,720.70, 106,086.51 and 28,599.08 is: 42,900.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,720.70 : 106,086.51 = 28,599.08 : x
  2. Step 2: Convert to fraction form
    70,720.70/106,086.51 = 28,599.08/x
  3. Step 3: Cross multiply
    70,720.70x = 106,086.51 × 28,599.08
  4. Step 4: Simplify right side
    70,720.70x = 3,033,976,055.98
  5. Step 5: Solve for x
    x = 3,033,976,055.98/70,720.70
  6. Step 6: Final answer
    x = 42,900.82

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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.