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Finding the Fourth Proportional to 70,510.70, 105,754.68 and 20,579.06

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Solution

The fourth proportional to 70,510.70, 105,754.68 and 20,579.06 is: 30,865.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,510.70 : 105,754.68 = 20,579.06 : x
  2. Step 2: Convert to fraction form
    70,510.70/105,754.68 = 20,579.06/x
  3. Step 3: Cross multiply
    70,510.70x = 105,754.68 × 20,579.06
  4. Step 4: Simplify right side
    70,510.70x = 2,176,331,376.23
  5. Step 5: Solve for x
    x = 2,176,331,376.23/70,510.70
  6. Step 6: Final answer
    x = 30,865.27

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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.