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Finding the Fourth Proportional to 72,408.64, 108,544.86 and 39,078.76

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Solution

The fourth proportional to 72,408.64, 108,544.86 and 39,078.76 is: 58,581.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,408.64 : 108,544.86 = 39,078.76 : x
  2. Step 2: Convert to fraction form
    72,408.64/108,544.86 = 39,078.76/x
  3. Step 3: Cross multiply
    72,408.64x = 108,544.86 × 39,078.76
  4. Step 4: Simplify right side
    72,408.64x = 4,241,798,533.17
  5. Step 5: Solve for x
    x = 4,241,798,533.17/72,408.64
  6. Step 6: Final answer
    x = 58,581.39

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1.5x scale

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.