Home / 90,258.12-135,518.40-66,638.52

Finding the Fourth Proportional to 90,258.12, 135,518.40 and 66,638.52

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Solution

The fourth proportional to 90,258.12, 135,518.40 and 66,638.52 is: 100,054.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,258.12 : 135,518.40 = 66,638.52 : x
  2. Step 2: Convert to fraction form
    90,258.12/135,518.40 = 66,638.52/x
  3. Step 3: Cross multiply
    90,258.12x = 135,518.40 × 66,638.52
  4. Step 4: Simplify right side
    90,258.12x = 9,030,745,608.77
  5. Step 5: Solve for x
    x = 9,030,745,608.77/90,258.12
  6. Step 6: Final answer
    x = 100,054.66

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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.