Home / 129,028.82-178,062.93-72,438.74

Finding the Fourth Proportional to 129,028.82, 178,062.93 and 72,438.74

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Solution

The fourth proportional to 129,028.82, 178,062.93 and 72,438.74 is: 99,967.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,028.82 : 178,062.93 = 72,438.74 : x
  2. Step 2: Convert to fraction form
    129,028.82/178,062.93 = 72,438.74/x
  3. Step 3: Cross multiply
    129,028.82x = 178,062.93 × 72,438.74
  4. Step 4: Simplify right side
    129,028.82x = 12,898,654,289.91
  5. Step 5: Solve for x
    x = 12,898,654,289.91/129,028.82
  6. Step 6: Final answer
    x = 99,967.23

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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.