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Finding the Fourth Proportional to 319,145.20, 478,890.60 and 141,679.60

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Solution

The fourth proportional to 319,145.20, 478,890.60 and 141,679.60 is: 212,596.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,145.20 : 478,890.60 = 141,679.60 : x
  2. Step 2: Convert to fraction form
    319,145.20/478,890.60 = 141,679.60/x
  3. Step 3: Cross multiply
    319,145.20x = 478,890.60 × 141,679.60
  4. Step 4: Simplify right side
    319,145.20x = 67,849,028,651.76
  5. Step 5: Solve for x
    x = 67,849,028,651.76/319,145.20
  6. Step 6: Final answer
    x = 212,596.11

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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.