Home / 154,118.67-212,679.77-86,136.21

Finding the Fourth Proportional to 154,118.67, 212,679.77 and 86,136.21

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Solution

The fourth proportional to 154,118.67, 212,679.77 and 86,136.21 is: 118,865.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,118.67 : 212,679.77 = 86,136.21 : x
  2. Step 2: Convert to fraction form
    154,118.67/212,679.77 = 86,136.21/x
  3. Step 3: Cross multiply
    154,118.67x = 212,679.77 × 86,136.21
  4. Step 4: Simplify right side
    154,118.67x = 18,319,428,900.79
  5. Step 5: Solve for x
    x = 18,319,428,900.79/154,118.67
  6. Step 6: Final answer
    x = 118,865.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.