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Finding the Fourth Proportional to 84,862.47, 127,311.93 and 28,699.81

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Solution

The fourth proportional to 84,862.47, 127,311.93 and 28,699.81 is: 43,055.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,862.47 : 127,311.93 = 28,699.81 : x
  2. Step 2: Convert to fraction form
    84,862.47/127,311.93 = 28,699.81/x
  3. Step 3: Cross multiply
    84,862.47x = 127,311.93 × 28,699.81
  4. Step 4: Simplify right side
    84,862.47x = 3,653,828,201.73
  5. Step 5: Solve for x
    x = 3,653,828,201.73/84,862.47
  6. Step 6: Final answer
    x = 43,055.88

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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.