Home / 42,729.12-64,102.19-13,145.83

Finding the Fourth Proportional to 42,729.12, 64,102.19 and 13,145.83

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Solution

The fourth proportional to 42,729.12, 64,102.19 and 13,145.83 is: 19,721.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,729.12 : 64,102.19 = 13,145.83 : x
  2. Step 2: Convert to fraction form
    42,729.12/64,102.19 = 13,145.83/x
  3. Step 3: Cross multiply
    42,729.12x = 64,102.19 × 13,145.83
  4. Step 4: Simplify right side
    42,729.12x = 842,676,266.38
  5. Step 5: Solve for x
    x = 842,676,266.38/42,729.12
  6. Step 6: Final answer
    x = 19,721.36

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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.