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Finding the Fourth Proportional to 74,942.80, 112,381.80 and 37,488.40

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Solution

The fourth proportional to 74,942.80, 112,381.80 and 37,488.40 is: 56,216.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,942.80 : 112,381.80 = 37,488.40 : x
  2. Step 2: Convert to fraction form
    74,942.80/112,381.80 = 37,488.40/x
  3. Step 3: Cross multiply
    74,942.80x = 112,381.80 × 37,488.40
  4. Step 4: Simplify right side
    74,942.80x = 4,213,013,871.12
  5. Step 5: Solve for x
    x = 4,213,013,871.12/74,942.80
  6. Step 6: Final answer
    x = 56,216.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.