Home / 319,439.58-478,685.98-129,669.02

Finding the Fourth Proportional to 319,439.58, 478,685.98 and 129,669.02

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Solution

The fourth proportional to 319,439.58, 478,685.98 and 129,669.02 is: 194,311.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,439.58 : 478,685.98 = 129,669.02 : x
  2. Step 2: Convert to fraction form
    319,439.58/478,685.98 = 129,669.02/x
  3. Step 3: Cross multiply
    319,439.58x = 478,685.98 × 129,669.02
  4. Step 4: Simplify right side
    319,439.58x = 62,070,741,914.34
  5. Step 5: Solve for x
    x = 62,070,741,914.34/319,439.58
  6. Step 6: Final answer
    x = 194,311.37

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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.