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Finding the Fourth Proportional to 143,200.80, 214,801.20 and 123,080.40

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Solution

The fourth proportional to 143,200.80, 214,801.20 and 123,080.40 is: 184,620.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,200.80 : 214,801.20 = 123,080.40 : x
  2. Step 2: Convert to fraction form
    143,200.80/214,801.20 = 123,080.40/x
  3. Step 3: Cross multiply
    143,200.80x = 214,801.20 × 123,080.40
  4. Step 4: Simplify right side
    143,200.80x = 26,437,817,616.48
  5. Step 5: Solve for x
    x = 26,437,817,616.48/143,200.80
  6. Step 6: Final answer
    x = 184,620.60

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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.