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Finding the Fourth Proportional to 145,758.48, 218,662.70 and 66,879.48

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Solution

The fourth proportional to 145,758.48, 218,662.70 and 66,879.48 is: 100,330.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,758.48 : 218,662.70 = 66,879.48 : x
  2. Step 2: Convert to fraction form
    145,758.48/218,662.70 = 66,879.48/x
  3. Step 3: Cross multiply
    145,758.48x = 218,662.70 × 66,879.48
  4. Step 4: Simplify right side
    145,758.48x = 14,624,047,671.40
  5. Step 5: Solve for x
    x = 14,624,047,671.40/145,758.48
  6. Step 6: Final answer
    x = 100,330.68

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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.