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Finding the Fourth Proportional to 78,954.81, 108,953.06 and 43,145.11

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Solution

The fourth proportional to 78,954.81, 108,953.06 and 43,145.11 is: 59,537.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,954.81 : 108,953.06 = 43,145.11 : x
  2. Step 2: Convert to fraction form
    78,954.81/108,953.06 = 43,145.11/x
  3. Step 3: Cross multiply
    78,954.81x = 108,953.06 × 43,145.11
  4. Step 4: Simplify right side
    78,954.81x = 4,700,791,758.54
  5. Step 5: Solve for x
    x = 4,700,791,758.54/78,954.81
  6. Step 6: Final answer
    x = 59,537.75

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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.