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Finding the Fourth Proportional to 217,671.12, 300,363 and 122,188.32

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Solution

The fourth proportional to 217,671.12, 300,363 and 122,188.32 is: 168,606.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,671.12 : 300,363 = 122,188.32 : x
  2. Step 2: Convert to fraction form
    217,671.12/300,363 = 122,188.32/x
  3. Step 3: Cross multiply
    217,671.12x = 300,363 × 122,188.32
  4. Step 4: Simplify right side
    217,671.12x = 36,700,850,360.16
  5. Step 5: Solve for x
    x = 36,700,850,360.16/217,671.12
  6. Step 6: Final answer
    x = 168,606.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.