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Finding the Fourth Proportional to 99,099.69, 136,871.19 and 65,259.51

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Solution

The fourth proportional to 99,099.69, 136,871.19 and 65,259.51 is: 90,132.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,099.69 : 136,871.19 = 65,259.51 : x
  2. Step 2: Convert to fraction form
    99,099.69/136,871.19 = 65,259.51/x
  3. Step 3: Cross multiply
    99,099.69x = 136,871.19 × 65,259.51
  4. Step 4: Simplify right side
    99,099.69x = 8,932,146,792.52
  5. Step 5: Solve for x
    x = 8,932,146,792.52/99,099.69
  6. Step 6: Final answer
    x = 90,132.94

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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.