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Finding the Fourth Proportional to 70,288.57, 105,432.99 and 17,697.70

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Solution

The fourth proportional to 70,288.57, 105,432.99 and 17,697.70 is: 26,546.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,288.57 : 105,432.99 = 17,697.70 : x
  2. Step 2: Convert to fraction form
    70,288.57/105,432.99 = 17,697.70/x
  3. Step 3: Cross multiply
    70,288.57x = 105,432.99 × 17,697.70
  4. Step 4: Simplify right side
    70,288.57x = 1,865,921,427.12
  5. Step 5: Solve for x
    x = 1,865,921,427.12/70,288.57
  6. Step 6: Final answer
    x = 26,546.58

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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.