Home / 287,078,064.09-396,169,721.31-163,318,741.21

Finding the Fourth Proportional to 287,078,064.09, 396,169,721.31 and 163,318,741.21

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Solution

The fourth proportional to 287,078,064.09, 396,169,721.31 and 163,318,741.21 is: 225,380,996.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,078,064.09 : 396,169,721.31 = 163,318,741.21 : x
  2. Step 2: Convert to fraction form
    287,078,064.09/396,169,721.31 = 163,318,741.21/x
  3. Step 3: Cross multiply
    287,078,064.09x = 396,169,721.31 × 163,318,741.21
  4. Step 4: Simplify right side
    287,078,064.09x = 64,701,940,189,865,712
  5. Step 5: Solve for x
    x = 64,701,940,189,865,712/287,078,064.09
  6. Step 6: Final answer
    x = 225,380,996.61

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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.