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Finding the Fourth Proportional to 70,245.90, 105,262.74 and 28,084.32

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Solution

The fourth proportional to 70,245.90, 105,262.74 and 28,084.32 is: 42,084.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,245.90 : 105,262.74 = 28,084.32 : x
  2. Step 2: Convert to fraction form
    70,245.90/105,262.74 = 28,084.32/x
  3. Step 3: Cross multiply
    70,245.90x = 105,262.74 × 28,084.32
  4. Step 4: Simplify right side
    70,245.90x = 2,956,232,474.24
  5. Step 5: Solve for x
    x = 2,956,232,474.24/70,245.90
  6. Step 6: Final answer
    x = 42,084.06

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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.