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Finding the Fourth Proportional to 221,237.80, 331,491.90 and 127,580.20

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Solution

The fourth proportional to 221,237.80, 331,491.90 and 127,580.20 is: 191,159.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,237.80 : 331,491.90 = 127,580.20 : x
  2. Step 2: Convert to fraction form
    221,237.80/331,491.90 = 127,580.20/x
  3. Step 3: Cross multiply
    221,237.80x = 331,491.90 × 127,580.20
  4. Step 4: Simplify right side
    221,237.80x = 42,291,802,900.38
  5. Step 5: Solve for x
    x = 42,291,802,900.38/221,237.80
  6. Step 6: Final answer
    x = 191,159.93

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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.