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Finding the Fourth Proportional to 85,451.60, 117,783.24 and 61,544.72

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Solution

The fourth proportional to 85,451.60, 117,783.24 and 61,544.72 is: 84,830.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,451.60 : 117,783.24 = 61,544.72 : x
  2. Step 2: Convert to fraction form
    85,451.60/117,783.24 = 61,544.72/x
  3. Step 3: Cross multiply
    85,451.60x = 117,783.24 × 61,544.72
  4. Step 4: Simplify right side
    85,451.60x = 7,248,936,526.49
  5. Step 5: Solve for x
    x = 7,248,936,526.49/85,451.60
  6. Step 6: Final answer
    x = 84,830.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.