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Finding the Fourth Proportional to 70,762.18, 106,126.24 and 20,828.70

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Solution

The fourth proportional to 70,762.18, 106,126.24 and 20,828.70 is: 31,238.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,762.18 : 106,126.24 = 20,828.70 : x
  2. Step 2: Convert to fraction form
    70,762.18/106,126.24 = 20,828.70/x
  3. Step 3: Cross multiply
    70,762.18x = 106,126.24 × 20,828.70
  4. Step 4: Simplify right side
    70,762.18x = 2,210,471,615.09
  5. Step 5: Solve for x
    x = 2,210,471,615.09/70,762.18
  6. Step 6: Final answer
    x = 31,238.04

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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.