Home / 128,933.82-177,931.74-72,349.38

Finding the Fourth Proportional to 128,933.82, 177,931.74 and 72,349.38

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Solution

The fourth proportional to 128,933.82, 177,931.74 and 72,349.38 is: 99,843.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,933.82 : 177,931.74 = 72,349.38 : x
  2. Step 2: Convert to fraction form
    128,933.82/177,931.74 = 72,349.38/x
  3. Step 3: Cross multiply
    128,933.82x = 177,931.74 × 72,349.38
  4. Step 4: Simplify right side
    128,933.82x = 12,873,251,071.32
  5. Step 5: Solve for x
    x = 12,873,251,071.32/128,933.82
  6. Step 6: Final answer
    x = 99,843.87

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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.