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Finding the Fourth Proportional to 91,715.80, 137,343.30 and 73,283.80

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Solution

The fourth proportional to 91,715.80, 137,343.30 and 73,283.80 is: 109,741.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,715.80 : 137,343.30 = 73,283.80 : x
  2. Step 2: Convert to fraction form
    91,715.80/137,343.30 = 73,283.80/x
  3. Step 3: Cross multiply
    91,715.80x = 137,343.30 × 73,283.80
  4. Step 4: Simplify right side
    91,715.80x = 10,065,038,928.54
  5. Step 5: Solve for x
    x = 10,065,038,928.54/91,715.80
  6. Step 6: Final answer
    x = 109,741.60

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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.