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Finding the Fourth Proportional to 81,861.99, 112,967.10 and 49,615.70

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Solution

The fourth proportional to 81,861.99, 112,967.10 and 49,615.70 is: 68,468.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,861.99 : 112,967.10 = 49,615.70 : x
  2. Step 2: Convert to fraction form
    81,861.99/112,967.10 = 49,615.70/x
  3. Step 3: Cross multiply
    81,861.99x = 112,967.10 × 49,615.70
  4. Step 4: Simplify right side
    81,861.99x = 5,604,941,178.63
  5. Step 5: Solve for x
    x = 5,604,941,178.63/81,861.99
  6. Step 6: Final answer
    x = 68,468.18

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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.