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Finding the Fourth Proportional to 85,707.94, 118,237.68 and 55,503

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Solution

The fourth proportional to 85,707.94, 118,237.68 and 55,503 is: 76,568.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,707.94 : 118,237.68 = 55,503 : x
  2. Step 2: Convert to fraction form
    85,707.94/118,237.68 = 55,503/x
  3. Step 3: Cross multiply
    85,707.94x = 118,237.68 × 55,503
  4. Step 4: Simplify right side
    85,707.94x = 6,562,545,953.04
  5. Step 5: Solve for x
    x = 6,562,545,953.04/85,707.94
  6. Step 6: Final answer
    x = 76,568.70

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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.