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Finding the Fourth Proportional to 319,140.38, 478,722.72 and 119,439.74

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Solution

The fourth proportional to 319,140.38, 478,722.72 and 119,439.74 is: 179,164.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,140.38 : 478,722.72 = 119,439.74 : x
  2. Step 2: Convert to fraction form
    319,140.38/478,722.72 = 119,439.74/x
  3. Step 3: Cross multiply
    319,140.38x = 478,722.72 × 119,439.74
  4. Step 4: Simplify right side
    319,140.38x = 57,178,517,208.89
  5. Step 5: Solve for x
    x = 57,178,517,208.89/319,140.38
  6. Step 6: Final answer
    x = 179,164.16

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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.