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Finding the Fourth Proportional to 85,435.76, 127,901.28 and 63,100.80

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Solution

The fourth proportional to 85,435.76, 127,901.28 and 63,100.80 is: 94,464.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,435.76 : 127,901.28 = 63,100.80 : x
  2. Step 2: Convert to fraction form
    85,435.76/127,901.28 = 63,100.80/x
  3. Step 3: Cross multiply
    85,435.76x = 127,901.28 × 63,100.80
  4. Step 4: Simplify right side
    85,435.76x = 8,070,673,089.02
  5. Step 5: Solve for x
    x = 8,070,673,089.02/85,435.76
  6. Step 6: Final answer
    x = 94,464.81

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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.