Home / 292,280.70-438,421.05-81,891.30

Finding the Fourth Proportional to 292,280.70, 438,421.05 and 81,891.30

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Solution

The fourth proportional to 292,280.70, 438,421.05 and 81,891.30 is: 122,836.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,280.70 : 438,421.05 = 81,891.30 : x
  2. Step 2: Convert to fraction form
    292,280.70/438,421.05 = 81,891.30/x
  3. Step 3: Cross multiply
    292,280.70x = 438,421.05 × 81,891.30
  4. Step 4: Simplify right side
    292,280.70x = 35,902,869,731.87
  5. Step 5: Solve for x
    x = 35,902,869,731.87/292,280.70
  6. Step 6: Final answer
    x = 122,836.95

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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.