Home / 123,003.90-169,666.65-77,601.78

Finding the Fourth Proportional to 123,003.90, 169,666.65 and 77,601.78

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Solution

The fourth proportional to 123,003.90, 169,666.65 and 77,601.78 is: 107,040.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,003.90 : 169,666.65 = 77,601.78 : x
  2. Step 2: Convert to fraction form
    123,003.90/169,666.65 = 77,601.78/x
  3. Step 3: Cross multiply
    123,003.90x = 169,666.65 × 77,601.78
  4. Step 4: Simplify right side
    123,003.90x = 13,166,434,046.64
  5. Step 5: Solve for x
    x = 13,166,434,046.64/123,003.90
  6. Step 6: Final answer
    x = 107,040.79

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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.