Home / 153,839.60-212,309.30-85,869.80

Finding the Fourth Proportional to 153,839.60, 212,309.30 and 85,869.80

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Solution

The fourth proportional to 153,839.60, 212,309.30 and 85,869.80 is: 118,506.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,839.60 : 212,309.30 = 85,869.80 : x
  2. Step 2: Convert to fraction form
    153,839.60/212,309.30 = 85,869.80/x
  3. Step 3: Cross multiply
    153,839.60x = 212,309.30 × 85,869.80
  4. Step 4: Simplify right side
    153,839.60x = 18,230,957,129.14
  5. Step 5: Solve for x
    x = 18,230,957,129.14/153,839.60
  6. Step 6: Final answer
    x = 118,506.27

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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.