Home / 71,742.30-107,478.36-42,072

Finding the Fourth Proportional to 71,742.30, 107,478.36 and 42,072

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Solution

The fourth proportional to 71,742.30, 107,478.36 and 42,072 is: 63,028.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,742.30 : 107,478.36 = 42,072 : x
  2. Step 2: Convert to fraction form
    71,742.30/107,478.36 = 42,072/x
  3. Step 3: Cross multiply
    71,742.30x = 107,478.36 × 42,072
  4. Step 4: Simplify right side
    71,742.30x = 4,521,829,561.92
  5. Step 5: Solve for x
    x = 4,521,829,561.92/71,742.30
  6. Step 6: Final answer
    x = 63,028.78

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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.