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Finding the Fourth Proportional to 91,969.13, 137,878.56 and 47,608.67

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Solution

The fourth proportional to 91,969.13, 137,878.56 and 47,608.67 is: 71,374.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,969.13 : 137,878.56 = 47,608.67 : x
  2. Step 2: Convert to fraction form
    91,969.13/137,878.56 = 47,608.67/x
  3. Step 3: Cross multiply
    91,969.13x = 137,878.56 × 47,608.67
  4. Step 4: Simplify right side
    91,969.13x = 6,564,214,173.72
  5. Step 5: Solve for x
    x = 6,564,214,173.72/91,969.13
  6. Step 6: Final answer
    x = 71,374.11

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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.