Home / 128,904.31-177,848.08-75,151.29

Finding the Fourth Proportional to 128,904.31, 177,848.08 and 75,151.29

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Solution

The fourth proportional to 128,904.31, 177,848.08 and 75,151.29 is: 103,685.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,904.31 : 177,848.08 = 75,151.29 : x
  2. Step 2: Convert to fraction form
    128,904.31/177,848.08 = 75,151.29/x
  3. Step 3: Cross multiply
    128,904.31x = 177,848.08 × 75,151.29
  4. Step 4: Simplify right side
    128,904.31x = 13,365,512,636.02
  5. Step 5: Solve for x
    x = 13,365,512,636.02/128,904.31
  6. Step 6: Final answer
    x = 103,685.54

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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.