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Finding the Fourth Proportional to 158,713.92, 218,970.96 and 90,682.08

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Solution

The fourth proportional to 158,713.92, 218,970.96 and 90,682.08 is: 125,110.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,713.92 : 218,970.96 = 90,682.08 : x
  2. Step 2: Convert to fraction form
    158,713.92/218,970.96 = 90,682.08/x
  3. Step 3: Cross multiply
    158,713.92x = 218,970.96 × 90,682.08
  4. Step 4: Simplify right side
    158,713.92x = 19,856,742,112.40
  5. Step 5: Solve for x
    x = 19,856,742,112.40/158,713.92
  6. Step 6: Final answer
    x = 125,110.27

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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.