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Finding the Fourth Proportional to 86,917.60, 130,246.80 and 73,698.40

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Solution

The fourth proportional to 86,917.60, 130,246.80 and 73,698.40 is: 110,437.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,917.60 : 130,246.80 = 73,698.40 : x
  2. Step 2: Convert to fraction form
    86,917.60/130,246.80 = 73,698.40/x
  3. Step 3: Cross multiply
    86,917.60x = 130,246.80 × 73,698.40
  4. Step 4: Simplify right side
    86,917.60x = 9,598,980,765.12
  5. Step 5: Solve for x
    x = 9,598,980,765.12/86,917.60
  6. Step 6: Final answer
    x = 110,437.71

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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.