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Finding the Fourth Proportional to 91,783.96, 137,718.06 and 54,418.12

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Solution

The fourth proportional to 91,783.96, 137,718.06 and 54,418.12 is: 81,652.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,783.96 : 137,718.06 = 54,418.12 : x
  2. Step 2: Convert to fraction form
    91,783.96/137,718.06 = 54,418.12/x
  3. Step 3: Cross multiply
    91,783.96x = 137,718.06 × 54,418.12
  4. Step 4: Simplify right side
    91,783.96x = 7,494,357,915.25
  5. Step 5: Solve for x
    x = 7,494,357,915.25/91,783.96
  6. Step 6: Final answer
    x = 81,652.15

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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.