Home / 128,448.52-177,428.39-98,602.65

Finding the Fourth Proportional to 128,448.52, 177,428.39 and 98,602.65

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Solution

The fourth proportional to 128,448.52, 177,428.39 and 98,602.65 is: 136,201.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,448.52 : 177,428.39 = 98,602.65 : x
  2. Step 2: Convert to fraction form
    128,448.52/177,428.39 = 98,602.65/x
  3. Step 3: Cross multiply
    128,448.52x = 177,428.39 × 98,602.65
  4. Step 4: Simplify right side
    128,448.52x = 17,494,909,611.58
  5. Step 5: Solve for x
    x = 17,494,909,611.58/128,448.52
  6. Step 6: Final answer
    x = 136,201.72

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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.