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Finding the Fourth Proportional to 98,716.86, 136,228.74 and 53,394.78

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Solution

The fourth proportional to 98,716.86, 136,228.74 and 53,394.78 is: 73,684.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,716.86 : 136,228.74 = 53,394.78 : x
  2. Step 2: Convert to fraction form
    98,716.86/136,228.74 = 53,394.78/x
  3. Step 3: Cross multiply
    98,716.86x = 136,228.74 × 53,394.78
  4. Step 4: Simplify right side
    98,716.86x = 7,273,903,601.98
  5. Step 5: Solve for x
    x = 7,273,903,601.98/98,716.86
  6. Step 6: Final answer
    x = 73,684.51

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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.