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Finding the Fourth Proportional to 78,953.74, 108,955.94 and 43,143.98

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Solution

The fourth proportional to 78,953.74, 108,955.94 and 43,143.98 is: 59,538.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,953.74 : 108,955.94 = 43,143.98 : x
  2. Step 2: Convert to fraction form
    78,953.74/108,955.94 = 43,143.98/x
  3. Step 3: Cross multiply
    78,953.74x = 108,955.94 × 43,143.98
  4. Step 4: Simplify right side
    78,953.74x = 4,700,792,135.74
  5. Step 5: Solve for x
    x = 4,700,792,135.74/78,953.74
  6. Step 6: Final answer
    x = 59,538.56

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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.