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Finding the Fourth Proportional to 212,726.80, 318,744.60 and 133,699.60

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Solution

The fourth proportional to 212,726.80, 318,744.60 and 133,699.60 is: 200,332.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,726.80 : 318,744.60 = 133,699.60 : x
  2. Step 2: Convert to fraction form
    212,726.80/318,744.60 = 133,699.60/x
  3. Step 3: Cross multiply
    212,726.80x = 318,744.60 × 133,699.60
  4. Step 4: Simplify right side
    212,726.80x = 42,616,025,522.16
  5. Step 5: Solve for x
    x = 42,616,025,522.16/212,726.80
  6. Step 6: Final answer
    x = 200,332.19

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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.