Home / 272,071.02-408,148.78-138,879.20

Finding the Fourth Proportional to 272,071.02, 408,148.78 and 138,879.20

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Solution

The fourth proportional to 272,071.02, 408,148.78 and 138,879.20 is: 208,340.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,071.02 : 408,148.78 = 138,879.20 : x
  2. Step 2: Convert to fraction form
    272,071.02/408,148.78 = 138,879.20/x
  3. Step 3: Cross multiply
    272,071.02x = 408,148.78 × 138,879.20
  4. Step 4: Simplify right side
    272,071.02x = 56,683,376,047.38
  5. Step 5: Solve for x
    x = 56,683,376,047.38/272,071.02
  6. Step 6: Final answer
    x = 208,340.37

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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.