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Finding the Fourth Proportional to 105,671,609.70, 158,507,414.55 and 66,929,560.80

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Solution

The fourth proportional to 105,671,609.70, 158,507,414.55 and 66,929,560.80 is: 100,394,341.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,671,609.70 : 158,507,414.55 = 66,929,560.80 : x
  2. Step 2: Convert to fraction form
    105,671,609.70/158,507,414.55 = 66,929,560.80/x
  3. Step 3: Cross multiply
    105,671,609.70x = 158,507,414.55 × 66,929,560.80
  4. Step 4: Simplify right side
    105,671,609.70x = 10,608,831,639,375,030
  5. Step 5: Solve for x
    x = 10,608,831,639,375,030/105,671,609.70
  6. Step 6: Final answer
    x = 100,394,341.20

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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.