Home / 130,812.60-196,218.90-121,189.80

Finding the Fourth Proportional to 130,812.60, 196,218.90 and 121,189.80

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Solution

The fourth proportional to 130,812.60, 196,218.90 and 121,189.80 is: 181,784.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,812.60 : 196,218.90 = 121,189.80 : x
  2. Step 2: Convert to fraction form
    130,812.60/196,218.90 = 121,189.80/x
  3. Step 3: Cross multiply
    130,812.60x = 196,218.90 × 121,189.80
  4. Step 4: Simplify right side
    130,812.60x = 23,779,729,247.22
  5. Step 5: Solve for x
    x = 23,779,729,247.22/130,812.60
  6. Step 6: Final answer
    x = 181,784.70

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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.