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Finding the Fourth Proportional to 90,014.40, 134,762.40 and 80,683.20

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Solution

The fourth proportional to 90,014.40, 134,762.40 and 80,683.20 is: 120,792.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,014.40 : 134,762.40 = 80,683.20 : x
  2. Step 2: Convert to fraction form
    90,014.40/134,762.40 = 80,683.20/x
  3. Step 3: Cross multiply
    90,014.40x = 134,762.40 × 80,683.20
  4. Step 4: Simplify right side
    90,014.40x = 10,873,061,671.68
  5. Step 5: Solve for x
    x = 10,873,061,671.68/90,014.40
  6. Step 6: Final answer
    x = 120,792.47

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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.