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Finding the Fourth Proportional to 90,466.80, 135,700.20 and 67,138.80

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Solution

The fourth proportional to 90,466.80, 135,700.20 and 67,138.80 is: 100,708.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,466.80 : 135,700.20 = 67,138.80 : x
  2. Step 2: Convert to fraction form
    90,466.80/135,700.20 = 67,138.80/x
  3. Step 3: Cross multiply
    90,466.80x = 135,700.20 × 67,138.80
  4. Step 4: Simplify right side
    90,466.80x = 9,110,748,587.76
  5. Step 5: Solve for x
    x = 9,110,748,587.76/90,466.80
  6. Step 6: Final answer
    x = 100,708.20

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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.