Home / 127,539.40-191,309.10-121,415.80

Finding the Fourth Proportional to 127,539.40, 191,309.10 and 121,415.80

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Solution

The fourth proportional to 127,539.40, 191,309.10 and 121,415.80 is: 182,123.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,539.40 : 191,309.10 = 121,415.80 : x
  2. Step 2: Convert to fraction form
    127,539.40/191,309.10 = 121,415.80/x
  3. Step 3: Cross multiply
    127,539.40x = 191,309.10 × 121,415.80
  4. Step 4: Simplify right side
    127,539.40x = 23,227,947,423.78
  5. Step 5: Solve for x
    x = 23,227,947,423.78/127,539.40
  6. Step 6: Final answer
    x = 182,123.70

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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.