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Finding the Fourth Proportional to 71,886.41, 99,208.95 and 39,626.77

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Solution

The fourth proportional to 71,886.41, 99,208.95 and 39,626.77 is: 54,688.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,886.41 : 99,208.95 = 39,626.77 : x
  2. Step 2: Convert to fraction form
    71,886.41/99,208.95 = 39,626.77/x
  3. Step 3: Cross multiply
    71,886.41x = 99,208.95 × 39,626.77
  4. Step 4: Simplify right side
    71,886.41x = 3,931,330,243.59
  5. Step 5: Solve for x
    x = 3,931,330,243.59/71,886.41
  6. Step 6: Final answer
    x = 54,688.09

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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.