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Finding the Fourth Proportional to 91,570.63, 137,361.14 and 28,399.74

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Solution

The fourth proportional to 91,570.63, 137,361.14 and 28,399.74 is: 42,601.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,570.63 : 137,361.14 = 28,399.74 : x
  2. Step 2: Convert to fraction form
    91,570.63/137,361.14 = 28,399.74/x
  3. Step 3: Cross multiply
    91,570.63x = 137,361.14 × 28,399.74
  4. Step 4: Simplify right side
    91,570.63x = 3,901,020,662.10
  5. Step 5: Solve for x
    x = 3,901,020,662.10/91,570.63
  6. Step 6: Final answer
    x = 42,601.22

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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.