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Finding the Fourth Proportional to 91,459.50, 137,160.70 and 54,009.56

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Solution

The fourth proportional to 91,459.50, 137,160.70 and 54,009.56 is: 80,997.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,459.50 : 137,160.70 = 54,009.56 : x
  2. Step 2: Convert to fraction form
    91,459.50/137,160.70 = 54,009.56/x
  3. Step 3: Cross multiply
    91,459.50x = 137,160.70 × 54,009.56
  4. Step 4: Simplify right side
    91,459.50x = 7,407,989,056.29
  5. Step 5: Solve for x
    x = 7,407,989,056.29/91,459.50
  6. Step 6: Final answer
    x = 80,997.48

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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.