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Finding the Fourth Proportional to 85,606.40, 128,563.20 and 62,259.20

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Solution

The fourth proportional to 85,606.40, 128,563.20 and 62,259.20 is: 93,500.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,606.40 : 128,563.20 = 62,259.20 : x
  2. Step 2: Convert to fraction form
    85,606.40/128,563.20 = 62,259.20/x
  3. Step 3: Cross multiply
    85,606.40x = 128,563.20 × 62,259.20
  4. Step 4: Simplify right side
    85,606.40x = 8,004,241,981.44
  5. Step 5: Solve for x
    x = 8,004,241,981.44/85,606.40
  6. Step 6: Final answer
    x = 93,500.51

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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.