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Finding the Fourth Proportional to 98,989.01, 136,569.04 and 65,015.90

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Solution

The fourth proportional to 98,989.01, 136,569.04 and 65,015.90 is: 89,698.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,989.01 : 136,569.04 = 65,015.90 : x
  2. Step 2: Convert to fraction form
    98,989.01/136,569.04 = 65,015.90/x
  3. Step 3: Cross multiply
    98,989.01x = 136,569.04 × 65,015.90
  4. Step 4: Simplify right side
    98,989.01x = 8,879,159,290.64
  5. Step 5: Solve for x
    x = 8,879,159,290.64/98,989.01
  6. Step 6: Final answer
    x = 89,698.43

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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.