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Finding the Fourth Proportional to 72,121.60, 108,108.96 and 48,750.40

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Solution

The fourth proportional to 72,121.60, 108,108.96 and 48,750.40 is: 73,075.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,121.60 : 108,108.96 = 48,750.40 : x
  2. Step 2: Convert to fraction form
    72,121.60/108,108.96 = 48,750.40/x
  3. Step 3: Cross multiply
    72,121.60x = 108,108.96 × 48,750.40
  4. Step 4: Simplify right side
    72,121.60x = 5,270,355,043.58
  5. Step 5: Solve for x
    x = 5,270,355,043.58/72,121.60
  6. Step 6: Final answer
    x = 73,075.96

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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.