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Finding the Fourth Proportional to 70,670.45, 105,964.16 and 28,551.87

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Solution

The fourth proportional to 70,670.45, 105,964.16 and 28,551.87 is: 42,811.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,670.45 : 105,964.16 = 28,551.87 : x
  2. Step 2: Convert to fraction form
    70,670.45/105,964.16 = 28,551.87/x
  3. Step 3: Cross multiply
    70,670.45x = 105,964.16 × 28,551.87
  4. Step 4: Simplify right side
    70,670.45x = 3,025,474,248.40
  5. Step 5: Solve for x
    x = 3,025,474,248.40/70,670.45
  6. Step 6: Final answer
    x = 42,811.03

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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.