Home / 90,986.17-136,492-31,808.38

Finding the Fourth Proportional to 90,986.17, 136,492 and 31,808.38

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Solution

The fourth proportional to 90,986.17, 136,492 and 31,808.38 is: 47,717.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,986.17 : 136,492 = 31,808.38 : x
  2. Step 2: Convert to fraction form
    90,986.17/136,492 = 31,808.38/x
  3. Step 3: Cross multiply
    90,986.17x = 136,492 × 31,808.38
  4. Step 4: Simplify right side
    90,986.17x = 4,341,589,402.96
  5. Step 5: Solve for x
    x = 4,341,589,402.96/90,986.17
  6. Step 6: Final answer
    x = 47,717.03

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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.