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Finding the Fourth Proportional to 98,989.02, 136,569.04 and 65,015.93

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Solution

The fourth proportional to 98,989.02, 136,569.04 and 65,015.93 is: 89,698.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,989.02 : 136,569.04 = 65,015.93 : x
  2. Step 2: Convert to fraction form
    98,989.02/136,569.04 = 65,015.93/x
  3. Step 3: Cross multiply
    98,989.02x = 136,569.04 × 65,015.93
  4. Step 4: Simplify right side
    98,989.02x = 8,879,163,323.69
  5. Step 5: Solve for x
    x = 8,879,163,323.69/98,989.02
  6. Step 6: Final answer
    x = 89,698.47

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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.