Home / 280,725.19-421,042.59-78,326.53

Finding the Fourth Proportional to 280,725.19, 421,042.59 and 78,326.53

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Solution

The fourth proportional to 280,725.19, 421,042.59 and 78,326.53 is: 117,477.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,725.19 : 421,042.59 = 78,326.53 : x
  2. Step 2: Convert to fraction form
    280,725.19/421,042.59 = 78,326.53/x
  3. Step 3: Cross multiply
    280,725.19x = 421,042.59 × 78,326.53
  4. Step 4: Simplify right side
    280,725.19x = 32,978,804,004.31
  5. Step 5: Solve for x
    x = 32,978,804,004.31/280,725.19
  6. Step 6: Final answer
    x = 117,477.18

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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.