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Finding the Fourth Proportional to 85,900.81, 128,820.35 and 29,725.67

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Solution

The fourth proportional to 85,900.81, 128,820.35 and 29,725.67 is: 44,577.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,900.81 : 128,820.35 = 29,725.67 : x
  2. Step 2: Convert to fraction form
    85,900.81/128,820.35 = 29,725.67/x
  3. Step 3: Cross multiply
    85,900.81x = 128,820.35 × 29,725.67
  4. Step 4: Simplify right side
    85,900.81x = 3,829,270,420.65
  5. Step 5: Solve for x
    x = 3,829,270,420.65/85,900.81
  6. Step 6: Final answer
    x = 44,577.82

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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.