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Finding the Fourth Proportional to 155,064.69, 213,933.29 and 87,957.81

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Solution

The fourth proportional to 155,064.69, 213,933.29 and 87,957.81 is: 121,350.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,064.69 : 213,933.29 = 87,957.81 : x
  2. Step 2: Convert to fraction form
    155,064.69/213,933.29 = 87,957.81/x
  3. Step 3: Cross multiply
    155,064.69x = 213,933.29 × 87,957.81
  4. Step 4: Simplify right side
    155,064.69x = 18,817,103,234.71
  5. Step 5: Solve for x
    x = 18,817,103,234.71/155,064.69
  6. Step 6: Final answer
    x = 121,350.02

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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.