Home / 128,321.40-177,022.02-83,013.60

Finding the Fourth Proportional to 128,321.40, 177,022.02 and 83,013.60

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Solution

The fourth proportional to 128,321.40, 177,022.02 and 83,013.60 is: 114,518.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,321.40 : 177,022.02 = 83,013.60 : x
  2. Step 2: Convert to fraction form
    128,321.40/177,022.02 = 83,013.60/x
  3. Step 3: Cross multiply
    128,321.40x = 177,022.02 × 83,013.60
  4. Step 4: Simplify right side
    128,321.40x = 14,695,235,159.47
  5. Step 5: Solve for x
    x = 14,695,235,159.47/128,321.40
  6. Step 6: Final answer
    x = 114,518.97

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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.