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Finding the Fourth Proportional to 100,904.96, 151,883.60 and 85,683.44

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Solution

The fourth proportional to 100,904.96, 151,883.60 and 85,683.44 is: 128,971.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,904.96 : 151,883.60 = 85,683.44 : x
  2. Step 2: Convert to fraction form
    100,904.96/151,883.60 = 85,683.44/x
  3. Step 3: Cross multiply
    100,904.96x = 151,883.60 × 85,683.44
  4. Step 4: Simplify right side
    100,904.96x = 13,013,909,327.58
  5. Step 5: Solve for x
    x = 13,013,909,327.58/100,904.96
  6. Step 6: Final answer
    x = 128,971.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.