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Finding the Fourth Proportional to 77,247.79, 106,612.74 and 55,806.90

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Solution

The fourth proportional to 77,247.79, 106,612.74 and 55,806.90 is: 77,021.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,247.79 : 106,612.74 = 55,806.90 : x
  2. Step 2: Convert to fraction form
    77,247.79/106,612.74 = 55,806.90/x
  3. Step 3: Cross multiply
    77,247.79x = 106,612.74 × 55,806.90
  4. Step 4: Simplify right side
    77,247.79x = 5,949,726,655.39
  5. Step 5: Solve for x
    x = 5,949,726,655.39/77,247.79
  6. Step 6: Final answer
    x = 77,021.32

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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.