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Finding the Fourth Proportional to 142,300.80, 213,170.40 and 72,230.40

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Solution

The fourth proportional to 142,300.80, 213,170.40 and 72,230.40 is: 108,203.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,300.80 : 213,170.40 = 72,230.40 : x
  2. Step 2: Convert to fraction form
    142,300.80/213,170.40 = 72,230.40/x
  3. Step 3: Cross multiply
    142,300.80x = 213,170.40 × 72,230.40
  4. Step 4: Simplify right side
    142,300.80x = 15,397,383,260.16
  5. Step 5: Solve for x
    x = 15,397,383,260.16/142,300.80
  6. Step 6: Final answer
    x = 108,203.07

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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.