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Finding the Fourth Proportional to 153,782.40, 230,673.60 and 128,899.20

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Solution

The fourth proportional to 153,782.40, 230,673.60 and 128,899.20 is: 193,348.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,782.40 : 230,673.60 = 128,899.20 : x
  2. Step 2: Convert to fraction form
    153,782.40/230,673.60 = 128,899.20/x
  3. Step 3: Cross multiply
    153,782.40x = 230,673.60 × 128,899.20
  4. Step 4: Simplify right side
    153,782.40x = 29,733,642,501.12
  5. Step 5: Solve for x
    x = 29,733,642,501.12/153,782.40
  6. Step 6: Final answer
    x = 193,348.80

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Similar ratio
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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.