Home / 128,830.07-177,785.96-71,470.53

Finding the Fourth Proportional to 128,830.07, 177,785.96 and 71,470.53

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Solution

The fourth proportional to 128,830.07, 177,785.96 and 71,470.53 is: 98,629.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,830.07 : 177,785.96 = 71,470.53 : x
  2. Step 2: Convert to fraction form
    128,830.07/177,785.96 = 71,470.53/x
  3. Step 3: Cross multiply
    128,830.07x = 177,785.96 × 71,470.53
  4. Step 4: Simplify right side
    128,830.07x = 12,706,456,430.41
  5. Step 5: Solve for x
    x = 12,706,456,430.41/128,830.07
  6. Step 6: Final answer
    x = 98,629.58

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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.