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Finding the Fourth Proportional to 84,685.80, 127,002.07 and 30,643.51

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Solution

The fourth proportional to 84,685.80, 127,002.07 and 30,643.51 is: 45,955.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,685.80 : 127,002.07 = 30,643.51 : x
  2. Step 2: Convert to fraction form
    84,685.80/127,002.07 = 30,643.51/x
  3. Step 3: Cross multiply
    84,685.80x = 127,002.07 × 30,643.51
  4. Step 4: Simplify right side
    84,685.80x = 3,891,789,202.07
  5. Step 5: Solve for x
    x = 3,891,789,202.07/84,685.80
  6. Step 6: Final answer
    x = 45,955.63

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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.