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Finding the Fourth Proportional to 158,339.92, 218,504.80 and 90,355.64

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Solution

The fourth proportional to 158,339.92, 218,504.80 and 90,355.64 is: 124,688.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,339.92 : 218,504.80 = 90,355.64 : x
  2. Step 2: Convert to fraction form
    158,339.92/218,504.80 = 90,355.64/x
  3. Step 3: Cross multiply
    158,339.92x = 218,504.80 × 90,355.64
  4. Step 4: Simplify right side
    158,339.92x = 19,743,141,047.07
  5. Step 5: Solve for x
    x = 19,743,141,047.07/158,339.92
  6. Step 6: Final answer
    x = 124,688.34

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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.