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Finding the Fourth Proportional to 71,972.45, 99,368.21 and 45,151.73

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Solution

The fourth proportional to 71,972.45, 99,368.21 and 45,151.73 is: 62,338.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,972.45 : 99,368.21 = 45,151.73 : x
  2. Step 2: Convert to fraction form
    71,972.45/99,368.21 = 45,151.73/x
  3. Step 3: Cross multiply
    71,972.45x = 99,368.21 × 45,151.73
  4. Step 4: Simplify right side
    71,972.45x = 4,486,646,588.50
  5. Step 5: Solve for x
    x = 4,486,646,588.50/71,972.45
  6. Step 6: Final answer
    x = 62,338.39

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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.