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Finding the Fourth Proportional to 62,984, 86,917.92 and 34,689.60

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Solution

The fourth proportional to 62,984, 86,917.92 and 34,689.60 is: 47,871.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,984 : 86,917.92 = 34,689.60 : x
  2. Step 2: Convert to fraction form
    62,984/86,917.92 = 34,689.60/x
  3. Step 3: Cross multiply
    62,984x = 86,917.92 × 34,689.60
  4. Step 4: Simplify right side
    62,984x = 3,015,147,877.63
  5. Step 5: Solve for x
    x = 3,015,147,877.63/62,984
  6. Step 6: Final answer
    x = 47,871.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.