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Finding the Fourth Proportional to 88,165.64, 121,679.70 and 54,636.68

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Solution

The fourth proportional to 88,165.64, 121,679.70 and 54,636.68 is: 75,405.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,165.64 : 121,679.70 = 54,636.68 : x
  2. Step 2: Convert to fraction form
    88,165.64/121,679.70 = 54,636.68/x
  3. Step 3: Cross multiply
    88,165.64x = 121,679.70 × 54,636.68
  4. Step 4: Simplify right side
    88,165.64x = 6,648,174,831.40
  5. Step 5: Solve for x
    x = 6,648,174,831.40/88,165.64
  6. Step 6: Final answer
    x = 75,405.51

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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.