Home / 123,501.34-170,430.78-66,912.58

Finding the Fourth Proportional to 123,501.34, 170,430.78 and 66,912.58

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Solution

The fourth proportional to 123,501.34, 170,430.78 and 66,912.58 is: 92,338.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,501.34 : 170,430.78 = 66,912.58 : x
  2. Step 2: Convert to fraction form
    123,501.34/170,430.78 = 66,912.58/x
  3. Step 3: Cross multiply
    123,501.34x = 170,430.78 × 66,912.58
  4. Step 4: Simplify right side
    123,501.34x = 11,403,963,201.21
  5. Step 5: Solve for x
    x = 11,403,963,201.21/123,501.34
  6. Step 6: Final answer
    x = 92,338.78

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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.