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Finding the Fourth Proportional to 85,938.32, 128,754.90 and 35,908.28

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Solution

The fourth proportional to 85,938.32, 128,754.90 and 35,908.28 is: 53,798.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,938.32 : 128,754.90 = 35,908.28 : x
  2. Step 2: Convert to fraction form
    85,938.32/128,754.90 = 35,908.28/x
  3. Step 3: Cross multiply
    85,938.32x = 128,754.90 × 35,908.28
  4. Step 4: Simplify right side
    85,938.32x = 4,623,367,000.57
  5. Step 5: Solve for x
    x = 4,623,367,000.57/85,938.32
  6. Step 6: Final answer
    x = 53,798.67

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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.