Home / 90,637.40-135,956.10-89,981.30

Finding the Fourth Proportional to 90,637.40, 135,956.10 and 89,981.30

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Solution

The fourth proportional to 90,637.40, 135,956.10 and 89,981.30 is: 134,971.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,637.40 : 135,956.10 = 89,981.30 : x
  2. Step 2: Convert to fraction form
    90,637.40/135,956.10 = 89,981.30/x
  3. Step 3: Cross multiply
    90,637.40x = 135,956.10 × 89,981.30
  4. Step 4: Simplify right side
    90,637.40x = 12,233,506,620.93
  5. Step 5: Solve for x
    x = 12,233,506,620.93/90,637.40
  6. Step 6: Final answer
    x = 134,971.95

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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.