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Finding the Fourth Proportional to 85,806.56, 118,470.72 and 53,590.16

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Solution

The fourth proportional to 85,806.56, 118,470.72 and 53,590.16 is: 73,990.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,806.56 : 118,470.72 = 53,590.16 : x
  2. Step 2: Convert to fraction form
    85,806.56/118,470.72 = 53,590.16/x
  3. Step 3: Cross multiply
    85,806.56x = 118,470.72 × 53,590.16
  4. Step 4: Simplify right side
    85,806.56x = 6,348,864,840.12
  5. Step 5: Solve for x
    x = 6,348,864,840.12/85,806.56
  6. Step 6: Final answer
    x = 73,990.44

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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.