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Finding the Fourth Proportional to 91,481.40, 137,222.10 and 89,638.20

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Solution

The fourth proportional to 91,481.40, 137,222.10 and 89,638.20 is: 134,457.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,481.40 : 137,222.10 = 89,638.20 : x
  2. Step 2: Convert to fraction form
    91,481.40/137,222.10 = 89,638.20/x
  3. Step 3: Cross multiply
    91,481.40x = 137,222.10 × 89,638.20
  4. Step 4: Simplify right side
    91,481.40x = 12,300,342,044.22
  5. Step 5: Solve for x
    x = 12,300,342,044.22/91,481.40
  6. Step 6: Final answer
    x = 134,457.30

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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.