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Finding the Fourth Proportional to 86,809.56, 130,218.12 and 42,473.64

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Solution

The fourth proportional to 86,809.56, 130,218.12 and 42,473.64 is: 63,712.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,809.56 : 130,218.12 = 42,473.64 : x
  2. Step 2: Convert to fraction form
    86,809.56/130,218.12 = 42,473.64/x
  3. Step 3: Cross multiply
    86,809.56x = 130,218.12 × 42,473.64
  4. Step 4: Simplify right side
    86,809.56x = 5,530,837,550.36
  5. Step 5: Solve for x
    x = 5,530,837,550.36/86,809.56
  6. Step 6: Final answer
    x = 63,712.31

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1.5x scale

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.