Home / 99,639.18-149,609.70-85,751.46

Finding the Fourth Proportional to 99,639.18, 149,609.70 and 85,751.46

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Solution

The fourth proportional to 99,639.18, 149,609.70 and 85,751.46 is: 128,757.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,639.18 : 149,609.70 = 85,751.46 : x
  2. Step 2: Convert to fraction form
    99,639.18/149,609.70 = 85,751.46/x
  3. Step 3: Cross multiply
    99,639.18x = 149,609.70 × 85,751.46
  4. Step 4: Simplify right side
    99,639.18x = 12,829,250,205.16
  5. Step 5: Solve for x
    x = 12,829,250,205.16/99,639.18
  6. Step 6: Final answer
    x = 128,757.08

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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.