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Finding the Fourth Proportional to 98,916.94, 136,512.07 and 55,881.50

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Solution

The fourth proportional to 98,916.94, 136,512.07 and 55,881.50 is: 77,120.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,916.94 : 136,512.07 = 55,881.50 : x
  2. Step 2: Convert to fraction form
    98,916.94/136,512.07 = 55,881.50/x
  3. Step 3: Cross multiply
    98,916.94x = 136,512.07 × 55,881.50
  4. Step 4: Simplify right side
    98,916.94x = 7,628,499,375.42
  5. Step 5: Solve for x
    x = 7,628,499,375.42/98,916.94
  6. Step 6: Final answer
    x = 77,120.26

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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.