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Finding the Fourth Proportional to 91,858.90, 137,788.35 and 39,273.70

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Solution

The fourth proportional to 91,858.90, 137,788.35 and 39,273.70 is: 58,910.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,858.90 : 137,788.35 = 39,273.70 : x
  2. Step 2: Convert to fraction form
    91,858.90/137,788.35 = 39,273.70/x
  3. Step 3: Cross multiply
    91,858.90x = 137,788.35 × 39,273.70
  4. Step 4: Simplify right side
    91,858.90x = 5,411,458,321.40
  5. Step 5: Solve for x
    x = 5,411,458,321.40/91,858.90
  6. Step 6: Final answer
    x = 58,910.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.