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Finding the Fourth Proportional to 85,555.80, 128,264.40 and 35,673.30

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Solution

The fourth proportional to 85,555.80, 128,264.40 and 35,673.30 is: 53,481.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,555.80 : 128,264.40 = 35,673.30 : x
  2. Step 2: Convert to fraction form
    85,555.80/128,264.40 = 35,673.30/x
  3. Step 3: Cross multiply
    85,555.80x = 128,264.40 × 35,673.30
  4. Step 4: Simplify right side
    85,555.80x = 4,575,614,420.52
  5. Step 5: Solve for x
    x = 4,575,614,420.52/85,555.80
  6. Step 6: Final answer
    x = 53,481.05

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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.