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Finding the Fourth Proportional to 79,603.60, 119,664.60 and 56,390.80

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Solution

The fourth proportional to 79,603.60, 119,664.60 and 56,390.80 is: 84,769.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,603.60 : 119,664.60 = 56,390.80 : x
  2. Step 2: Convert to fraction form
    79,603.60/119,664.60 = 56,390.80/x
  3. Step 3: Cross multiply
    79,603.60x = 119,664.60 × 56,390.80
  4. Step 4: Simplify right side
    79,603.60x = 6,747,982,525.68
  5. Step 5: Solve for x
    x = 6,747,982,525.68/79,603.60
  6. Step 6: Final answer
    x = 84,769.82

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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.