Home / 280,433.16-420,650.82-70,071.30

Finding the Fourth Proportional to 280,433.16, 420,650.82 and 70,071.30

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Solution

The fourth proportional to 280,433.16, 420,650.82 and 70,071.30 is: 105,107.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,433.16 : 420,650.82 = 70,071.30 : x
  2. Step 2: Convert to fraction form
    280,433.16/420,650.82 = 70,071.30/x
  3. Step 3: Cross multiply
    280,433.16x = 420,650.82 × 70,071.30
  4. Step 4: Simplify right side
    280,433.16x = 29,475,549,803.47
  5. Step 5: Solve for x
    x = 29,475,549,803.47/280,433.16
  6. Step 6: Final answer
    x = 105,107.22

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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.