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Finding the Fourth Proportional to 78,954.32, 108,955.04 and 43,143.42

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Solution

The fourth proportional to 78,954.32, 108,955.04 and 43,143.42 is: 59,536.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,954.32 : 108,955.04 = 43,143.42 : x
  2. Step 2: Convert to fraction form
    78,954.32/108,955.04 = 43,143.42/x
  3. Step 3: Cross multiply
    78,954.32x = 108,955.04 × 43,143.42
  4. Step 4: Simplify right side
    78,954.32x = 4,700,693,051.84
  5. Step 5: Solve for x
    x = 4,700,693,051.84/78,954.32
  6. Step 6: Final answer
    x = 59,536.87

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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.