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Finding the Fourth Proportional to 145,409.60, 217,999.20 and 79,745.60

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Solution

The fourth proportional to 145,409.60, 217,999.20 and 79,745.60 is: 119,555.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,409.60 : 217,999.20 = 79,745.60 : x
  2. Step 2: Convert to fraction form
    145,409.60/217,999.20 = 79,745.60/x
  3. Step 3: Cross multiply
    145,409.60x = 217,999.20 × 79,745.60
  4. Step 4: Simplify right side
    145,409.60x = 17,384,477,003.52
  5. Step 5: Solve for x
    x = 17,384,477,003.52/145,409.60
  6. Step 6: Final answer
    x = 119,555.22

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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.