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Finding the Fourth Proportional to 91,559.79, 137,390.72 and 49,438.98

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Solution

The fourth proportional to 91,559.79, 137,390.72 and 49,438.98 is: 74,186.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,559.79 : 137,390.72 = 49,438.98 : x
  2. Step 2: Convert to fraction form
    91,559.79/137,390.72 = 49,438.98/x
  3. Step 3: Cross multiply
    91,559.79x = 137,390.72 × 49,438.98
  4. Step 4: Simplify right side
    91,559.79x = 6,792,456,811.07
  5. Step 5: Solve for x
    x = 6,792,456,811.07/91,559.79
  6. Step 6: Final answer
    x = 74,186.02

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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.