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Finding the Fourth Proportional to 98,919.46, 136,571.16 and 68,695.12

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Solution

The fourth proportional to 98,919.46, 136,571.16 and 68,695.12 is: 94,842.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,919.46 : 136,571.16 = 68,695.12 : x
  2. Step 2: Convert to fraction form
    98,919.46/136,571.16 = 68,695.12/x
  3. Step 3: Cross multiply
    98,919.46x = 136,571.16 × 68,695.12
  4. Step 4: Simplify right side
    98,919.46x = 9,381,772,224.74
  5. Step 5: Solve for x
    x = 9,381,772,224.74/98,919.46
  6. Step 6: Final answer
    x = 94,842.53

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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.