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Finding the Fourth Proportional to 70,835.03, 106,264.07 and 20,920.16

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Solution

The fourth proportional to 70,835.03, 106,264.07 and 20,920.16 is: 31,383.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,835.03 : 106,264.07 = 20,920.16 : x
  2. Step 2: Convert to fraction form
    70,835.03/106,264.07 = 20,920.16/x
  3. Step 3: Cross multiply
    70,835.03x = 106,264.07 × 20,920.16
  4. Step 4: Simplify right side
    70,835.03x = 2,223,060,710.73
  5. Step 5: Solve for x
    x = 2,223,060,710.73/70,835.03
  6. Step 6: Final answer
    x = 31,383.64

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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.