Home / 45,421.49-68,135.63-12,140.79

Finding the Fourth Proportional to 45,421.49, 68,135.63 and 12,140.79

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Solution

The fourth proportional to 45,421.49, 68,135.63 and 12,140.79 is: 18,212.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,421.49 : 68,135.63 = 12,140.79 : x
  2. Step 2: Convert to fraction form
    45,421.49/68,135.63 = 12,140.79/x
  3. Step 3: Cross multiply
    45,421.49x = 68,135.63 × 12,140.79
  4. Step 4: Simplify right side
    45,421.49x = 827,220,314.64
  5. Step 5: Solve for x
    x = 827,220,314.64/45,421.49
  6. Step 6: Final answer
    x = 18,212.09

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1.5x scale

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.