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Finding the Fourth Proportional to 74,060.40, 111,106.80 and 36,638.40

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Solution

The fourth proportional to 74,060.40, 111,106.80 and 36,638.40 is: 54,965.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,060.40 : 111,106.80 = 36,638.40 : x
  2. Step 2: Convert to fraction form
    74,060.40/111,106.80 = 36,638.40/x
  3. Step 3: Cross multiply
    74,060.40x = 111,106.80 × 36,638.40
  4. Step 4: Simplify right side
    74,060.40x = 4,070,775,381.12
  5. Step 5: Solve for x
    x = 4,070,775,381.12/74,060.40
  6. Step 6: Final answer
    x = 54,965.61

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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.