Home / 100,692,056.72-138,869,189.12-85,087,283.60

Finding the Fourth Proportional to 100,692,056.72, 138,869,189.12 and 85,087,283.60

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Solution

The fourth proportional to 100,692,056.72, 138,869,189.12 and 85,087,283.60 is: 117,347,906.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,692,056.72 : 138,869,189.12 = 85,087,283.60 : x
  2. Step 2: Convert to fraction form
    100,692,056.72/138,869,189.12 = 85,087,283.60/x
  3. Step 3: Cross multiply
    100,692,056.72x = 138,869,189.12 × 85,087,283.60
  4. Step 4: Simplify right side
    100,692,056.72x = 11,816,002,077,955,474
  5. Step 5: Solve for x
    x = 11,816,002,077,955,474/100,692,056.72
  6. Step 6: Final answer
    x = 117,347,906.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.