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Finding the Fourth Proportional to 221,081.55, 305,324.15 and 152,349.72

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Solution

The fourth proportional to 221,081.55, 305,324.15 and 152,349.72 is: 210,402.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,081.55 : 305,324.15 = 152,349.72 : x
  2. Step 2: Convert to fraction form
    221,081.55/305,324.15 = 152,349.72/x
  3. Step 3: Cross multiply
    221,081.55x = 305,324.15 × 152,349.72
  4. Step 4: Simplify right side
    221,081.55x = 46,516,047,999.99
  5. Step 5: Solve for x
    x = 46,516,047,999.99/221,081.55
  6. Step 6: Final answer
    x = 210,402.22

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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.