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Finding the Fourth Proportional to 79,681.62, 109,959.75 and 43,870.89

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Solution

The fourth proportional to 79,681.62, 109,959.75 and 43,870.89 is: 60,541.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,681.62 : 109,959.75 = 43,870.89 : x
  2. Step 2: Convert to fraction form
    79,681.62/109,959.75 = 43,870.89/x
  3. Step 3: Cross multiply
    79,681.62x = 109,959.75 × 43,870.89
  4. Step 4: Simplify right side
    79,681.62x = 4,824,032,096.68
  5. Step 5: Solve for x
    x = 4,824,032,096.68/79,681.62
  6. Step 6: Final answer
    x = 60,541.34

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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.