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Finding the Fourth Proportional to 50,642.90, 69,885.78 and 27,981.50

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Solution

The fourth proportional to 50,642.90, 69,885.78 and 27,981.50 is: 38,613.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,642.90 : 69,885.78 = 27,981.50 : x
  2. Step 2: Convert to fraction form
    50,642.90/69,885.78 = 27,981.50/x
  3. Step 3: Cross multiply
    50,642.90x = 69,885.78 × 27,981.50
  4. Step 4: Simplify right side
    50,642.90x = 1,955,508,953.07
  5. Step 5: Solve for x
    x = 1,955,508,953.07/50,642.90
  6. Step 6: Final answer
    x = 38,613.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.