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Finding the Fourth Proportional to 127,250.40, 191,021.40 and 77,386.80

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Solution

The fourth proportional to 127,250.40, 191,021.40 and 77,386.80 is: 116,168.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,250.40 : 191,021.40 = 77,386.80 : x
  2. Step 2: Convert to fraction form
    127,250.40/191,021.40 = 77,386.80/x
  3. Step 3: Cross multiply
    127,250.40x = 191,021.40 × 77,386.80
  4. Step 4: Simplify right side
    127,250.40x = 14,782,534,877.52
  5. Step 5: Solve for x
    x = 14,782,534,877.52/127,250.40
  6. Step 6: Final answer
    x = 116,168.87

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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.