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Finding the Fourth Proportional to 108,689.25, 149,960.49 and 70,450.40

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Solution

The fourth proportional to 108,689.25, 149,960.49 and 70,450.40 is: 97,201.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,689.25 : 149,960.49 = 70,450.40 : x
  2. Step 2: Convert to fraction form
    108,689.25/149,960.49 = 70,450.40/x
  3. Step 3: Cross multiply
    108,689.25x = 149,960.49 × 70,450.40
  4. Step 4: Simplify right side
    108,689.25x = 10,564,776,504.70
  5. Step 5: Solve for x
    x = 10,564,776,504.70/108,689.25
  6. Step 6: Final answer
    x = 97,201.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.