Home / 90,637.70-135,956.55-89,981.60

Finding the Fourth Proportional to 90,637.70, 135,956.55 and 89,981.60

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Solution

The fourth proportional to 90,637.70, 135,956.55 and 89,981.60 is: 134,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,637.70 : 135,956.55 = 89,981.60 : x
  2. Step 2: Convert to fraction form
    90,637.70/135,956.55 = 89,981.60/x
  3. Step 3: Cross multiply
    90,637.70x = 135,956.55 × 89,981.60
  4. Step 4: Simplify right side
    90,637.70x = 12,233,587,899.48
  5. Step 5: Solve for x
    x = 12,233,587,899.48/90,637.70
  6. Step 6: Final answer
    x = 134,972.40

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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.