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Finding the Fourth Proportional to 100,954.53, 139,317.45 and 60,668.91

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Solution

The fourth proportional to 100,954.53, 139,317.45 and 60,668.91 is: 83,723.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,954.53 : 139,317.45 = 60,668.91 : x
  2. Step 2: Convert to fraction form
    100,954.53/139,317.45 = 60,668.91/x
  3. Step 3: Cross multiply
    100,954.53x = 139,317.45 × 60,668.91
  4. Step 4: Simplify right side
    100,954.53x = 8,452,236,835.55
  5. Step 5: Solve for x
    x = 8,452,236,835.55/100,954.53
  6. Step 6: Final answer
    x = 83,723.21

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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.