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Finding the Fourth Proportional to 136,173.50, 187,919.44 and 76,557.50

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Solution

The fourth proportional to 136,173.50, 187,919.44 and 76,557.50 is: 105,649.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,173.50 : 187,919.44 = 76,557.50 : x
  2. Step 2: Convert to fraction form
    136,173.50/187,919.44 = 76,557.50/x
  3. Step 3: Cross multiply
    136,173.50x = 187,919.44 × 76,557.50
  4. Step 4: Simplify right side
    136,173.50x = 14,386,642,527.80
  5. Step 5: Solve for x
    x = 14,386,642,527.80/136,173.50
  6. Step 6: Final answer
    x = 105,649.36

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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.