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Finding the Fourth Proportional to 71,870.76, 99,184.68 and 40,039.64

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Solution

The fourth proportional to 71,870.76, 99,184.68 and 40,039.64 is: 55,256.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,870.76 : 99,184.68 = 40,039.64 : x
  2. Step 2: Convert to fraction form
    71,870.76/99,184.68 = 40,039.64/x
  3. Step 3: Cross multiply
    71,870.76x = 99,184.68 × 40,039.64
  4. Step 4: Simplify right side
    71,870.76x = 3,971,318,880.72
  5. Step 5: Solve for x
    x = 3,971,318,880.72/71,870.76
  6. Step 6: Final answer
    x = 55,256.39

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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.