Home / 77,979.06-107,611-42,168.98

Finding the Fourth Proportional to 77,979.06, 107,611 and 42,168.98

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Solution

The fourth proportional to 77,979.06, 107,611 and 42,168.98 is: 58,193.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,979.06 : 107,611 = 42,168.98 : x
  2. Step 2: Convert to fraction form
    77,979.06/107,611 = 42,168.98/x
  3. Step 3: Cross multiply
    77,979.06x = 107,611 × 42,168.98
  4. Step 4: Simplify right side
    77,979.06x = 4,537,846,106.78
  5. Step 5: Solve for x
    x = 4,537,846,106.78/77,979.06
  6. Step 6: Final answer
    x = 58,193.14

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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.