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Finding the Fourth Proportional to 70,918.30, 106,377.79 and 20,999.34

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Solution

The fourth proportional to 70,918.30, 106,377.79 and 20,999.34 is: 31,499.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,918.30 : 106,377.79 = 20,999.34 : x
  2. Step 2: Convert to fraction form
    70,918.30/106,377.79 = 20,999.34/x
  3. Step 3: Cross multiply
    70,918.30x = 106,377.79 × 20,999.34
  4. Step 4: Simplify right side
    70,918.30x = 2,233,862,848.77
  5. Step 5: Solve for x
    x = 2,233,862,848.77/70,918.30
  6. Step 6: Final answer
    x = 31,499.11

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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.