Home / 128,904.81-177,848.77-75,151.79

Finding the Fourth Proportional to 128,904.81, 177,848.77 and 75,151.79

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Solution

The fourth proportional to 128,904.81, 177,848.77 and 75,151.79 is: 103,686.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,904.81 : 177,848.77 = 75,151.79 : x
  2. Step 2: Convert to fraction form
    128,904.81/177,848.77 = 75,151.79/x
  3. Step 3: Cross multiply
    128,904.81x = 177,848.77 × 75,151.79
  4. Step 4: Simplify right side
    128,904.81x = 13,365,653,414.80
  5. Step 5: Solve for x
    x = 13,365,653,414.80/128,904.81
  6. Step 6: Final answer
    x = 103,686.23

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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.