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Finding the Fourth Proportional to 221,033.80, 331,550.70 and 127,430.20

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Solution

The fourth proportional to 221,033.80, 331,550.70 and 127,430.20 is: 191,145.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,033.80 : 331,550.70 = 127,430.20 : x
  2. Step 2: Convert to fraction form
    221,033.80/331,550.70 = 127,430.20/x
  3. Step 3: Cross multiply
    221,033.80x = 331,550.70 × 127,430.20
  4. Step 4: Simplify right side
    221,033.80x = 42,249,572,011.14
  5. Step 5: Solve for x
    x = 42,249,572,011.14/221,033.80
  6. Step 6: Final answer
    x = 191,145.30

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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.