Home / 70,972.38-106,421.40-21,045.60

Finding the Fourth Proportional to 70,972.38, 106,421.40 and 21,045.60

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Solution

The fourth proportional to 70,972.38, 106,421.40 and 21,045.60 is: 31,557.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,972.38 : 106,421.40 = 21,045.60 : x
  2. Step 2: Convert to fraction form
    70,972.38/106,421.40 = 21,045.60/x
  3. Step 3: Cross multiply
    70,972.38x = 106,421.40 × 21,045.60
  4. Step 4: Simplify right side
    70,972.38x = 2,239,702,215.84
  5. Step 5: Solve for x
    x = 2,239,702,215.84/70,972.38
  6. Step 6: Final answer
    x = 31,557.38

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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.