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Finding the Fourth Proportional to 61,139.64, 84,304.89 and 43,203.81

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Solution

The fourth proportional to 61,139.64, 84,304.89 and 43,203.81 is: 59,573.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,139.64 : 84,304.89 = 43,203.81 : x
  2. Step 2: Convert to fraction form
    61,139.64/84,304.89 = 43,203.81/x
  3. Step 3: Cross multiply
    61,139.64x = 84,304.89 × 43,203.81
  4. Step 4: Simplify right side
    61,139.64x = 3,642,292,449.63
  5. Step 5: Solve for x
    x = 3,642,292,449.63/61,139.64
  6. Step 6: Final answer
    x = 59,573.34

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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.