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Finding the Fourth Proportional to 72,671.60, 109,007.40 and 65,529.20

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Solution

The fourth proportional to 72,671.60, 109,007.40 and 65,529.20 is: 98,293.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,671.60 : 109,007.40 = 65,529.20 : x
  2. Step 2: Convert to fraction form
    72,671.60/109,007.40 = 65,529.20/x
  3. Step 3: Cross multiply
    72,671.60x = 109,007.40 × 65,529.20
  4. Step 4: Simplify right side
    72,671.60x = 7,143,167,716.08
  5. Step 5: Solve for x
    x = 7,143,167,716.08/72,671.60
  6. Step 6: Final answer
    x = 98,293.80

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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.