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Finding the Fourth Proportional to 84,786.60, 117,011.04 and 48,978.12

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Solution

The fourth proportional to 84,786.60, 117,011.04 and 48,978.12 is: 67,593.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,786.60 : 117,011.04 = 48,978.12 : x
  2. Step 2: Convert to fraction form
    84,786.60/117,011.04 = 48,978.12/x
  3. Step 3: Cross multiply
    84,786.60x = 117,011.04 × 48,978.12
  4. Step 4: Simplify right side
    84,786.60x = 5,730,980,758.44
  5. Step 5: Solve for x
    x = 5,730,980,758.44/84,786.60
  6. Step 6: Final answer
    x = 67,593.00

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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.