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Finding the Fourth Proportional to 78,651.80, 117,383.49 and 73,318.93

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Solution

The fourth proportional to 78,651.80, 117,383.49 and 73,318.93 is: 109,424.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,651.80 : 117,383.49 = 73,318.93 : x
  2. Step 2: Convert to fraction form
    78,651.80/117,383.49 = 73,318.93/x
  3. Step 3: Cross multiply
    78,651.80x = 117,383.49 × 73,318.93
  4. Step 4: Simplify right side
    78,651.80x = 8,606,431,886.47
  5. Step 5: Solve for x
    x = 8,606,431,886.47/78,651.80
  6. Step 6: Final answer
    x = 109,424.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.