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Finding the Fourth Proportional to 217,459.88, 300,109.60 and 121,972.72

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Solution

The fourth proportional to 217,459.88, 300,109.60 and 121,972.72 is: 168,330.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,459.88 : 300,109.60 = 121,972.72 : x
  2. Step 2: Convert to fraction form
    217,459.88/300,109.60 = 121,972.72/x
  3. Step 3: Cross multiply
    217,459.88x = 300,109.60 × 121,972.72
  4. Step 4: Simplify right side
    217,459.88x = 36,605,184,210.11
  5. Step 5: Solve for x
    x = 36,605,184,210.11/217,459.88
  6. Step 6: Final answer
    x = 168,330.75

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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.