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Finding the Fourth Proportional to 72,748.60, 109,091.08 and 36,702.88

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Solution

The fourth proportional to 72,748.60, 109,091.08 and 36,702.88 is: 55,038.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,748.60 : 109,091.08 = 36,702.88 : x
  2. Step 2: Convert to fraction form
    72,748.60/109,091.08 = 36,702.88/x
  3. Step 3: Cross multiply
    72,748.60x = 109,091.08 × 36,702.88
  4. Step 4: Simplify right side
    72,748.60x = 4,003,956,818.31
  5. Step 5: Solve for x
    x = 4,003,956,818.31/72,748.60
  6. Step 6: Final answer
    x = 55,038.27

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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.