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Finding the Fourth Proportional to 319,190.64, 478,900.26 and 136,744.89

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Solution

The fourth proportional to 319,190.64, 478,900.26 and 136,744.89 is: 205,166.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,190.64 : 478,900.26 = 136,744.89 : x
  2. Step 2: Convert to fraction form
    319,190.64/478,900.26 = 136,744.89/x
  3. Step 3: Cross multiply
    319,190.64x = 478,900.26 × 136,744.89
  4. Step 4: Simplify right side
    319,190.64x = 65,487,163,374.67
  5. Step 5: Solve for x
    x = 65,487,163,374.67/319,190.64
  6. Step 6: Final answer
    x = 205,166.30

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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.