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Finding the Fourth Proportional to 124,289.88, 171,465.39 and 83,988.96

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Solution

The fourth proportional to 124,289.88, 171,465.39 and 83,988.96 is: 115,867.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,289.88 : 171,465.39 = 83,988.96 : x
  2. Step 2: Convert to fraction form
    124,289.88/171,465.39 = 83,988.96/x
  3. Step 3: Cross multiply
    124,289.88x = 171,465.39 × 83,988.96
  4. Step 4: Simplify right side
    124,289.88x = 14,401,199,782.09
  5. Step 5: Solve for x
    x = 14,401,199,782.09/124,289.88
  6. Step 6: Final answer
    x = 115,867.84

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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.