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Finding the Fourth Proportional to 74,123.10, 103,979.70 and 74,123.10

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Solution

The fourth proportional to 74,123.10, 103,979.70 and 74,123.10 is: 103,979.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,123.10 : 103,979.70 = 74,123.10 : x
  2. Step 2: Convert to fraction form
    74,123.10/103,979.70 = 74,123.10/x
  3. Step 3: Cross multiply
    74,123.10x = 103,979.70 × 74,123.10
  4. Step 4: Simplify right side
    74,123.10x = 7,707,297,701.07
  5. Step 5: Solve for x
    x = 7,707,297,701.07/74,123.10
  6. Step 6: Final answer
    x = 103,979.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.