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Finding the Fourth Proportional to 84,855.51, 127,332.23 and 45,434.61

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Solution

The fourth proportional to 84,855.51, 127,332.23 and 45,434.61 is: 68,178.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,855.51 : 127,332.23 = 45,434.61 : x
  2. Step 2: Convert to fraction form
    84,855.51/127,332.23 = 45,434.61/x
  3. Step 3: Cross multiply
    84,855.51x = 127,332.23 × 45,434.61
  4. Step 4: Simplify right side
    84,855.51x = 5,785,289,983.31
  5. Step 5: Solve for x
    x = 5,785,289,983.31/84,855.51
  6. Step 6: Final answer
    x = 68,178.13

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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.