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Finding the Fourth Proportional to 410,146.60, 615,104.70 and 129,749.80

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Solution

The fourth proportional to 410,146.60, 615,104.70 and 129,749.80 is: 194,588.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,146.60 : 615,104.70 = 129,749.80 : x
  2. Step 2: Convert to fraction form
    410,146.60/615,104.70 = 129,749.80/x
  3. Step 3: Cross multiply
    410,146.60x = 615,104.70 × 129,749.80
  4. Step 4: Simplify right side
    410,146.60x = 79,809,711,804.06
  5. Step 5: Solve for x
    x = 79,809,711,804.06/410,146.60
  6. Step 6: Final answer
    x = 194,588.26

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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.