Home / 280,935.76-421,399.32-70,573.72

Finding the Fourth Proportional to 280,935.76, 421,399.32 and 70,573.72

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Solution

The fourth proportional to 280,935.76, 421,399.32 and 70,573.72 is: 105,859.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,935.76 : 421,399.32 = 70,573.72 : x
  2. Step 2: Convert to fraction form
    280,935.76/421,399.32 = 70,573.72/x
  3. Step 3: Cross multiply
    280,935.76x = 421,399.32 × 70,573.72
  4. Step 4: Simplify right side
    280,935.76x = 29,739,717,617.87
  5. Step 5: Solve for x
    x = 29,739,717,617.87/280,935.76
  6. Step 6: Final answer
    x = 105,859.49

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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.