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Finding the Fourth Proportional to 136,503.58, 188,372.10 and 76,079.74

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Solution

The fourth proportional to 136,503.58, 188,372.10 and 76,079.74 is: 104,988.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,503.58 : 188,372.10 = 76,079.74 : x
  2. Step 2: Convert to fraction form
    136,503.58/188,372.10 = 76,079.74/x
  3. Step 3: Cross multiply
    136,503.58x = 188,372.10 × 76,079.74
  4. Step 4: Simplify right side
    136,503.58x = 14,331,300,391.25
  5. Step 5: Solve for x
    x = 14,331,300,391.25/136,503.58
  6. Step 6: Final answer
    x = 104,988.46

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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.