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Finding the Fourth Proportional to 85,874.94, 118,551.99 and 66,711.90

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Solution

The fourth proportional to 85,874.94, 118,551.99 and 66,711.90 is: 92,097.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,874.94 : 118,551.99 = 66,711.90 : x
  2. Step 2: Convert to fraction form
    85,874.94/118,551.99 = 66,711.90/x
  3. Step 3: Cross multiply
    85,874.94x = 118,551.99 × 66,711.90
  4. Step 4: Simplify right side
    85,874.94x = 7,908,828,501.68
  5. Step 5: Solve for x
    x = 7,908,828,501.68/85,874.94
  6. Step 6: Final answer
    x = 92,097.05

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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.