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Finding the Fourth Proportional to 212,820, 319,231.60 and 94,459.52

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Solution

The fourth proportional to 212,820, 319,231.60 and 94,459.52 is: 141,689.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,820 : 319,231.60 = 94,459.52 : x
  2. Step 2: Convert to fraction form
    212,820/319,231.60 = 94,459.52/x
  3. Step 3: Cross multiply
    212,820x = 319,231.60 × 94,459.52
  4. Step 4: Simplify right side
    212,820x = 30,154,463,704.83
  5. Step 5: Solve for x
    x = 30,154,463,704.83/212,820
  6. Step 6: Final answer
    x = 141,689.99

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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.