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Finding the Fourth Proportional to 86,485.60, 119,379.78 and 50,687.20

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Solution

The fourth proportional to 86,485.60, 119,379.78 and 50,687.20 is: 69,965.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,485.60 : 119,379.78 = 50,687.20 : x
  2. Step 2: Convert to fraction form
    86,485.60/119,379.78 = 50,687.20/x
  3. Step 3: Cross multiply
    86,485.60x = 119,379.78 × 50,687.20
  4. Step 4: Simplify right side
    86,485.60x = 6,051,026,784.82
  5. Step 5: Solve for x
    x = 6,051,026,784.82/86,485.60
  6. Step 6: Final answer
    x = 69,965.71

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1.5x scale

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.