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Finding the Fourth Proportional to 85,856.72, 118,481.16 and 48,130.64

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Solution

The fourth proportional to 85,856.72, 118,481.16 and 48,130.64 is: 66,419.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,856.72 : 118,481.16 = 48,130.64 : x
  2. Step 2: Convert to fraction form
    85,856.72/118,481.16 = 48,130.64/x
  3. Step 3: Cross multiply
    85,856.72x = 118,481.16 × 48,130.64
  4. Step 4: Simplify right side
    85,856.72x = 5,702,574,058.74
  5. Step 5: Solve for x
    x = 5,702,574,058.74/85,856.72
  6. Step 6: Final answer
    x = 66,419.66

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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.