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Finding the Fourth Proportional to 85,498.50, 128,247.80 and 23,169

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Solution

The fourth proportional to 85,498.50, 128,247.80 and 23,169 is: 34,753.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,498.50 : 128,247.80 = 23,169 : x
  2. Step 2: Convert to fraction form
    85,498.50/128,247.80 = 23,169/x
  3. Step 3: Cross multiply
    85,498.50x = 128,247.80 × 23,169
  4. Step 4: Simplify right side
    85,498.50x = 2,971,373,162.36
  5. Step 5: Solve for x
    x = 2,971,373,162.36/85,498.50
  6. Step 6: Final answer
    x = 34,753.51

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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.