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Finding the Fourth Proportional to 85,107.79, 127,661.72 and 84,984.81

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Solution

The fourth proportional to 85,107.79, 127,661.72 and 84,984.81 is: 127,477.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,107.79 : 127,661.72 = 84,984.81 : x
  2. Step 2: Convert to fraction form
    85,107.79/127,661.72 = 84,984.81/x
  3. Step 3: Cross multiply
    85,107.79x = 127,661.72 × 84,984.81
  4. Step 4: Simplify right side
    85,107.79x = 10,849,306,433.51
  5. Step 5: Solve for x
    x = 10,849,306,433.51/85,107.79
  6. Step 6: Final answer
    x = 127,477.24

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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.