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Finding the Fourth Proportional to 91,605.54, 137,427.90 and 28,424.28

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Solution

The fourth proportional to 91,605.54, 137,427.90 and 28,424.28 is: 42,642.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,605.54 : 137,427.90 = 28,424.28 : x
  2. Step 2: Convert to fraction form
    91,605.54/137,427.90 = 28,424.28/x
  3. Step 3: Cross multiply
    91,605.54x = 137,427.90 × 28,424.28
  4. Step 4: Simplify right side
    91,605.54x = 3,906,289,109.41
  5. Step 5: Solve for x
    x = 3,906,289,109.41/91,605.54
  6. Step 6: Final answer
    x = 42,642.50

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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.