Home / 319,421,123.31-440,802,478.13-172,743,407.31

Finding the Fourth Proportional to 319,421,123.31, 440,802,478.13 and 172,743,407.31

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Solution

The fourth proportional to 319,421,123.31, 440,802,478.13 and 172,743,407.31 is: 238,386,620.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,421,123.31 : 440,802,478.13 = 172,743,407.31 : x
  2. Step 2: Convert to fraction form
    319,421,123.31/440,802,478.13 = 172,743,407.31/x
  3. Step 3: Cross multiply
    319,421,123.31x = 440,802,478.13 × 172,743,407.31
  4. Step 4: Simplify right side
    319,421,123.31x = 76,145,722,022,004,240
  5. Step 5: Solve for x
    x = 76,145,722,022,004,240/319,421,123.31
  6. Step 6: Final answer
    x = 238,386,620.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.