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Finding the Fourth Proportional to 155,063.51, 213,992.81 and 87,092.46

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Solution

The fourth proportional to 155,063.51, 213,992.81 and 87,092.46 is: 120,190.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,063.51 : 213,992.81 = 87,092.46 : x
  2. Step 2: Convert to fraction form
    155,063.51/213,992.81 = 87,092.46/x
  3. Step 3: Cross multiply
    155,063.51x = 213,992.81 × 87,092.46
  4. Step 4: Simplify right side
    155,063.51x = 18,637,159,809.75
  5. Step 5: Solve for x
    x = 18,637,159,809.75/155,063.51
  6. Step 6: Final answer
    x = 120,190.50

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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.