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Finding the Fourth Proportional to 90,493.80, 124,766.64 and 64,683.24

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Solution

The fourth proportional to 90,493.80, 124,766.64 and 64,683.24 is: 89,180.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,493.80 : 124,766.64 = 64,683.24 : x
  2. Step 2: Convert to fraction form
    90,493.80/124,766.64 = 64,683.24/x
  3. Step 3: Cross multiply
    90,493.80x = 124,766.64 × 64,683.24
  4. Step 4: Simplify right side
    90,493.80x = 8,070,310,519.11
  5. Step 5: Solve for x
    x = 8,070,310,519.11/90,493.80
  6. Step 6: Final answer
    x = 89,180.81

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1.5x scale

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.