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Finding the Fourth Proportional to 130,903.60, 196,355.40 and 121,280.80

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Solution

The fourth proportional to 130,903.60, 196,355.40 and 121,280.80 is: 181,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,903.60 : 196,355.40 = 121,280.80 : x
  2. Step 2: Convert to fraction form
    130,903.60/196,355.40 = 121,280.80/x
  3. Step 3: Cross multiply
    130,903.60x = 196,355.40 × 121,280.80
  4. Step 4: Simplify right side
    130,903.60x = 23,814,139,996.32
  5. Step 5: Solve for x
    x = 23,814,139,996.32/130,903.60
  6. Step 6: Final answer
    x = 181,921.20

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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.