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Finding the Fourth Proportional to 291,728.42, 437,666.52 and 81,366.32

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Solution

The fourth proportional to 291,728.42, 437,666.52 and 81,366.32 is: 122,070.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,728.42 : 437,666.52 = 81,366.32 : x
  2. Step 2: Convert to fraction form
    291,728.42/437,666.52 = 81,366.32/x
  3. Step 3: Cross multiply
    291,728.42x = 437,666.52 × 81,366.32
  4. Step 4: Simplify right side
    291,728.42x = 35,611,314,119.61
  5. Step 5: Solve for x
    x = 35,611,314,119.61/291,728.42
  6. Step 6: Final answer
    x = 122,070.09

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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.