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Finding the Fourth Proportional to 136,530.74, 188,412 and 76,100.70

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Solution

The fourth proportional to 136,530.74, 188,412 and 76,100.70 is: 105,018.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,530.74 : 188,412 = 76,100.70 : x
  2. Step 2: Convert to fraction form
    136,530.74/188,412 = 76,100.70/x
  3. Step 3: Cross multiply
    136,530.74x = 188,412 × 76,100.70
  4. Step 4: Simplify right side
    136,530.74x = 14,338,285,088.40
  5. Step 5: Solve for x
    x = 14,338,285,088.40/136,530.74
  6. Step 6: Final answer
    x = 105,018.73

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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.