Home / 127,530.40-191,295.60-121,115.20

Finding the Fourth Proportional to 127,530.40, 191,295.60 and 121,115.20

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Solution

The fourth proportional to 127,530.40, 191,295.60 and 121,115.20 is: 181,672.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,530.40 : 191,295.60 = 121,115.20 : x
  2. Step 2: Convert to fraction form
    127,530.40/191,295.60 = 121,115.20/x
  3. Step 3: Cross multiply
    127,530.40x = 191,295.60 × 121,115.20
  4. Step 4: Simplify right side
    127,530.40x = 23,168,804,853.12
  5. Step 5: Solve for x
    x = 23,168,804,853.12/127,530.40
  6. Step 6: Final answer
    x = 181,672.80

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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.