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Finding the Fourth Proportional to 154,563.76, 231,688.78 and 87,866.07

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Solution

The fourth proportional to 154,563.76, 231,688.78 and 87,866.07 is: 131,709.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,563.76 : 231,688.78 = 87,866.07 : x
  2. Step 2: Convert to fraction form
    154,563.76/231,688.78 = 87,866.07/x
  3. Step 3: Cross multiply
    154,563.76x = 231,688.78 × 87,866.07
  4. Step 4: Simplify right side
    154,563.76x = 20,357,582,561.69
  5. Step 5: Solve for x
    x = 20,357,582,561.69/154,563.76
  6. Step 6: Final answer
    x = 131,709.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.