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Finding the Fourth Proportional to 90,683.60, 136,025.40 and 84,808.40

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Solution

The fourth proportional to 90,683.60, 136,025.40 and 84,808.40 is: 127,212.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,683.60 : 136,025.40 = 84,808.40 : x
  2. Step 2: Convert to fraction form
    90,683.60/136,025.40 = 84,808.40/x
  3. Step 3: Cross multiply
    90,683.60x = 136,025.40 × 84,808.40
  4. Step 4: Simplify right side
    90,683.60x = 11,536,096,533.36
  5. Step 5: Solve for x
    x = 11,536,096,533.36/90,683.60
  6. Step 6: Final answer
    x = 127,212.60

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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.