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Finding the Fourth Proportional to 123,478.29, 170,400.11 and 66,889.67

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Solution

The fourth proportional to 123,478.29, 170,400.11 and 66,889.67 is: 92,307.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,478.29 : 170,400.11 = 66,889.67 : x
  2. Step 2: Convert to fraction form
    123,478.29/170,400.11 = 66,889.67/x
  3. Step 3: Cross multiply
    123,478.29x = 170,400.11 × 66,889.67
  4. Step 4: Simplify right side
    123,478.29x = 11,398,005,939.41
  5. Step 5: Solve for x
    x = 11,398,005,939.41/123,478.29
  6. Step 6: Final answer
    x = 92,307.77

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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.