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Finding the Fourth Proportional to 72,671.45, 108,928.80 and 35,152.25

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Solution

The fourth proportional to 72,671.45, 108,928.80 and 35,152.25 is: 52,690.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,671.45 : 108,928.80 = 35,152.25 : x
  2. Step 2: Convert to fraction form
    72,671.45/108,928.80 = 35,152.25/x
  3. Step 3: Cross multiply
    72,671.45x = 108,928.80 × 35,152.25
  4. Step 4: Simplify right side
    72,671.45x = 3,829,091,865.16
  5. Step 5: Solve for x
    x = 3,829,091,865.16/72,671.45
  6. Step 6: Final answer
    x = 52,690.46

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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.