Home / 280,639.91-421,125.98-103,271.51

Finding the Fourth Proportional to 280,639.91, 421,125.98 and 103,271.51

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Solution

The fourth proportional to 280,639.91, 421,125.98 and 103,271.51 is: 154,968.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,639.91 : 421,125.98 = 103,271.51 : x
  2. Step 2: Convert to fraction form
    280,639.91/421,125.98 = 103,271.51/x
  3. Step 3: Cross multiply
    280,639.91x = 421,125.98 × 103,271.51
  4. Step 4: Simplify right side
    280,639.91x = 43,490,313,232.84
  5. Step 5: Solve for x
    x = 43,490,313,232.84/280,639.91
  6. Step 6: Final answer
    x = 154,968.39

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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.