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Finding the Fourth Proportional to 66,999.74, 100,368.21 and 38,860.67

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Solution

The fourth proportional to 66,999.74, 100,368.21 and 38,860.67 is: 58,214.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,999.74 : 100,368.21 = 38,860.67 : x
  2. Step 2: Convert to fraction form
    66,999.74/100,368.21 = 38,860.67/x
  3. Step 3: Cross multiply
    66,999.74x = 100,368.21 × 38,860.67
  4. Step 4: Simplify right side
    66,999.74x = 3,900,376,283.95
  5. Step 5: Solve for x
    x = 3,900,376,283.95/66,999.74
  6. Step 6: Final answer
    x = 58,214.80

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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.