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Finding the Fourth Proportional to 319,289.96, 478,972 and 106,076.90

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Solution

The fourth proportional to 319,289.96, 478,972 and 106,076.90 is: 159,127.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,289.96 : 478,972 = 106,076.90 : x
  2. Step 2: Convert to fraction form
    319,289.96/478,972 = 106,076.90/x
  3. Step 3: Cross multiply
    319,289.96x = 478,972 × 106,076.90
  4. Step 4: Simplify right side
    319,289.96x = 50,807,864,946.80
  5. Step 5: Solve for x
    x = 50,807,864,946.80/319,289.96
  6. Step 6: Final answer
    x = 159,127.66

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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.