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Finding the Fourth Proportional to 158,636.12, 218,915.78 and 90,652.32

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Solution

The fourth proportional to 158,636.12, 218,915.78 and 90,652.32 is: 125,099.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,636.12 : 218,915.78 = 90,652.32 : x
  2. Step 2: Convert to fraction form
    158,636.12/218,915.78 = 90,652.32/x
  3. Step 3: Cross multiply
    158,636.12x = 218,915.78 × 90,652.32
  4. Step 4: Simplify right side
    158,636.12x = 19,845,222,888.35
  5. Step 5: Solve for x
    x = 19,845,222,888.35/158,636.12
  6. Step 6: Final answer
    x = 125,099.02

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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.