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Finding the Fourth Proportional to 77,119.80, 106,424.57 and 43,127.90

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Solution

The fourth proportional to 77,119.80, 106,424.57 and 43,127.90 is: 59,516.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,119.80 : 106,424.57 = 43,127.90 : x
  2. Step 2: Convert to fraction form
    77,119.80/106,424.57 = 43,127.90/x
  3. Step 3: Cross multiply
    77,119.80x = 106,424.57 × 43,127.90
  4. Step 4: Simplify right side
    77,119.80x = 4,589,867,464.74
  5. Step 5: Solve for x
    x = 4,589,867,464.74/77,119.80
  6. Step 6: Final answer
    x = 59,516.07

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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.