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Finding the Fourth Proportional to 291,663.70, 437,441.55 and 81,258.10

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Solution

The fourth proportional to 291,663.70, 437,441.55 and 81,258.10 is: 121,872.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,663.70 : 437,441.55 = 81,258.10 : x
  2. Step 2: Convert to fraction form
    291,663.70/437,441.55 = 81,258.10/x
  3. Step 3: Cross multiply
    291,663.70x = 437,441.55 × 81,258.10
  4. Step 4: Simplify right side
    291,663.70x = 35,545,669,214.06
  5. Step 5: Solve for x
    x = 35,545,669,214.06/291,663.70
  6. Step 6: Final answer
    x = 121,872.11

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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.