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Finding the Fourth Proportional to 70,496.95, 105,720.83 and 28,366.12

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Solution

The fourth proportional to 70,496.95, 105,720.83 and 28,366.12 is: 42,539.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,496.95 : 105,720.83 = 28,366.12 : x
  2. Step 2: Convert to fraction form
    70,496.95/105,720.83 = 28,366.12/x
  3. Step 3: Cross multiply
    70,496.95x = 105,720.83 × 28,366.12
  4. Step 4: Simplify right side
    70,496.95x = 2,998,889,252.29
  5. Step 5: Solve for x
    x = 2,998,889,252.29/70,496.95
  6. Step 6: Final answer
    x = 42,539.28

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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.