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Finding the Fourth Proportional to 101,039.19, 139,435.07 and 55,718.78

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Solution

The fourth proportional to 101,039.19, 139,435.07 and 55,718.78 is: 76,892.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,039.19 : 139,435.07 = 55,718.78 : x
  2. Step 2: Convert to fraction form
    101,039.19/139,435.07 = 55,718.78/x
  3. Step 3: Cross multiply
    101,039.19x = 139,435.07 × 55,718.78
  4. Step 4: Simplify right side
    101,039.19x = 7,769,152,059.61
  5. Step 5: Solve for x
    x = 7,769,152,059.61/101,039.19
  6. Step 6: Final answer
    x = 76,892.46

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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.