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Finding the Fourth Proportional to 71,861.84, 99,162.90 and 40,030.05

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Solution

The fourth proportional to 71,861.84, 99,162.90 and 40,030.05 is: 55,237.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,861.84 : 99,162.90 = 40,030.05 : x
  2. Step 2: Convert to fraction form
    71,861.84/99,162.90 = 40,030.05/x
  3. Step 3: Cross multiply
    71,861.84x = 99,162.90 × 40,030.05
  4. Step 4: Simplify right side
    71,861.84x = 3,969,495,845.15
  5. Step 5: Solve for x
    x = 3,969,495,845.15/71,861.84
  6. Step 6: Final answer
    x = 55,237.89

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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.