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Finding the Fourth Proportional to 66,503.73, 91,762.58 and 39,648.72

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Solution

The fourth proportional to 66,503.73, 91,762.58 and 39,648.72 is: 54,707.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,503.73 : 91,762.58 = 39,648.72 : x
  2. Step 2: Convert to fraction form
    66,503.73/91,762.58 = 39,648.72/x
  3. Step 3: Cross multiply
    66,503.73x = 91,762.58 × 39,648.72
  4. Step 4: Simplify right side
    66,503.73x = 3,638,268,642.65
  5. Step 5: Solve for x
    x = 3,638,268,642.65/66,503.73
  6. Step 6: Final answer
    x = 54,707.74

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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.