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Finding the Fourth Proportional to 85,475.60, 128,237.10 and 35,579.20

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Solution

The fourth proportional to 85,475.60, 128,237.10 and 35,579.20 is: 53,378.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,475.60 : 128,237.10 = 35,579.20 : x
  2. Step 2: Convert to fraction form
    85,475.60/128,237.10 = 35,579.20/x
  3. Step 3: Cross multiply
    85,475.60x = 128,237.10 × 35,579.20
  4. Step 4: Simplify right side
    85,475.60x = 4,562,573,428.32
  5. Step 5: Solve for x
    x = 4,562,573,428.32/85,475.60
  6. Step 6: Final answer
    x = 53,378.67

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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.