Home / 280,828.96-421,269.84-103,339.36

Finding the Fourth Proportional to 280,828.96, 421,269.84 and 103,339.36

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Solution

The fourth proportional to 280,828.96, 421,269.84 and 103,339.36 is: 155,018.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,828.96 : 421,269.84 = 103,339.36 : x
  2. Step 2: Convert to fraction form
    280,828.96/421,269.84 = 103,339.36/x
  3. Step 3: Cross multiply
    280,828.96x = 421,269.84 × 103,339.36
  4. Step 4: Simplify right side
    280,828.96x = 43,533,755,652.90
  5. Step 5: Solve for x
    x = 43,533,755,652.90/280,828.96
  6. Step 6: Final answer
    x = 155,018.75

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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.