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Finding the Fourth Proportional to 88,683.90, 133,025.85 and 81,426.30

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Solution

The fourth proportional to 88,683.90, 133,025.85 and 81,426.30 is: 122,139.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,683.90 : 133,025.85 = 81,426.30 : x
  2. Step 2: Convert to fraction form
    88,683.90/133,025.85 = 81,426.30/x
  3. Step 3: Cross multiply
    88,683.90x = 133,025.85 × 81,426.30
  4. Step 4: Simplify right side
    88,683.90x = 10,831,802,769.86
  5. Step 5: Solve for x
    x = 10,831,802,769.86/88,683.90
  6. Step 6: Final answer
    x = 122,139.45

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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.