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Finding the Fourth Proportional to 123,686.88, 170,687.94 and 69,970.76

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Solution

The fourth proportional to 123,686.88, 170,687.94 and 69,970.76 is: 96,559.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,686.88 : 170,687.94 = 69,970.76 : x
  2. Step 2: Convert to fraction form
    123,686.88/170,687.94 = 69,970.76/x
  3. Step 3: Cross multiply
    123,686.88x = 170,687.94 × 69,970.76
  4. Step 4: Simplify right side
    123,686.88x = 11,943,164,884.63
  5. Step 5: Solve for x
    x = 11,943,164,884.63/123,686.88
  6. Step 6: Final answer
    x = 96,559.67

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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.