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Finding the Fourth Proportional to 137,910.60, 190,309.50 and 77,483.88

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Solution

The fourth proportional to 137,910.60, 190,309.50 and 77,483.88 is: 106,923.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,910.60 : 190,309.50 = 77,483.88 : x
  2. Step 2: Convert to fraction form
    137,910.60/190,309.50 = 77,483.88/x
  3. Step 3: Cross multiply
    137,910.60x = 190,309.50 × 77,483.88
  4. Step 4: Simplify right side
    137,910.60x = 14,745,918,460.86
  5. Step 5: Solve for x
    x = 14,745,918,460.86/137,910.60
  6. Step 6: Final answer
    x = 106,923.75

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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.