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Finding the Fourth Proportional to 84,870, 127,333.08 and 45,418.32

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Solution

The fourth proportional to 84,870, 127,333.08 and 45,418.32 is: 68,142.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,870 : 127,333.08 = 45,418.32 : x
  2. Step 2: Convert to fraction form
    84,870/127,333.08 = 45,418.32/x
  3. Step 3: Cross multiply
    84,870x = 127,333.08 × 45,418.32
  4. Step 4: Simplify right side
    84,870x = 5,783,254,574.03
  5. Step 5: Solve for x
    x = 5,783,254,574.03/84,870
  6. Step 6: Final answer
    x = 68,142.51

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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.