Home / 312,018,751.44-430,599,412.12-172,789,513.21

Finding the Fourth Proportional to 312,018,751.44, 430,599,412.12 and 172,789,513.21

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Solution

The fourth proportional to 312,018,751.44, 430,599,412.12 and 172,789,513.21 is: 238,457,023.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,018,751.44 : 430,599,412.12 = 172,789,513.21 : x
  2. Step 2: Convert to fraction form
    312,018,751.44/430,599,412.12 = 172,789,513.21/x
  3. Step 3: Cross multiply
    312,018,751.44x = 430,599,412.12 × 172,789,513.21
  4. Step 4: Simplify right side
    312,018,751.44x = 74,403,062,808,726,976
  5. Step 5: Solve for x
    x = 74,403,062,808,726,976/312,018,751.44
  6. Step 6: Final answer
    x = 238,457,023.71

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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.