Home / 77,979.04-107,611-42,168.96

Finding the Fourth Proportional to 77,979.04, 107,611 and 42,168.96

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Solution

The fourth proportional to 77,979.04, 107,611 and 42,168.96 is: 58,193.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,979.04 : 107,611 = 42,168.96 : x
  2. Step 2: Convert to fraction form
    77,979.04/107,611 = 42,168.96/x
  3. Step 3: Cross multiply
    77,979.04x = 107,611 × 42,168.96
  4. Step 4: Simplify right side
    77,979.04x = 4,537,843,954.56
  5. Step 5: Solve for x
    x = 4,537,843,954.56/77,979.04
  6. Step 6: Final answer
    x = 58,193.12

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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.