Home / 71,799.21-99,071.10-39,967.43

Finding the Fourth Proportional to 71,799.21, 99,071.10 and 39,967.43

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Solution

The fourth proportional to 71,799.21, 99,071.10 and 39,967.43 is: 55,148.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,799.21 : 99,071.10 = 39,967.43 : x
  2. Step 2: Convert to fraction form
    71,799.21/99,071.10 = 39,967.43/x
  3. Step 3: Cross multiply
    71,799.21x = 99,071.10 × 39,967.43
  4. Step 4: Simplify right side
    71,799.21x = 3,959,616,758.92
  5. Step 5: Solve for x
    x = 3,959,616,758.92/71,799.21
  6. Step 6: Final answer
    x = 55,148.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.