Home / 129,548.79-178,777.68-75,111.51

Finding the Fourth Proportional to 129,548.79, 178,777.68 and 75,111.51

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Solution

The fourth proportional to 129,548.79, 178,777.68 and 75,111.51 is: 103,654.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,548.79 : 178,777.68 = 75,111.51 : x
  2. Step 2: Convert to fraction form
    129,548.79/178,777.68 = 75,111.51/x
  3. Step 3: Cross multiply
    129,548.79x = 178,777.68 × 75,111.51
  4. Step 4: Simplify right side
    129,548.79x = 13,428,261,499.10
  5. Step 5: Solve for x
    x = 13,428,261,499.10/129,548.79
  6. Step 6: Final answer
    x = 103,654.09

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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.