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Finding the Fourth Proportional to 133,828.16, 200,678.67 and 77,685.48

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Solution

The fourth proportional to 133,828.16, 200,678.67 and 77,685.48 is: 116,491.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,828.16 : 200,678.67 = 77,685.48 : x
  2. Step 2: Convert to fraction form
    133,828.16/200,678.67 = 77,685.48/x
  3. Step 3: Cross multiply
    133,828.16x = 200,678.67 × 77,685.48
  4. Step 4: Simplify right side
    133,828.16x = 15,589,818,804.71
  5. Step 5: Solve for x
    x = 15,589,818,804.71/133,828.16
  6. Step 6: Final answer
    x = 116,491.32

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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.