Home / 128,080.40-176,743.62-71,495.36

Finding the Fourth Proportional to 128,080.40, 176,743.62 and 71,495.36

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Solution

The fourth proportional to 128,080.40, 176,743.62 and 71,495.36 is: 98,659.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,080.40 : 176,743.62 = 71,495.36 : x
  2. Step 2: Convert to fraction form
    128,080.40/176,743.62 = 71,495.36/x
  3. Step 3: Cross multiply
    128,080.40x = 176,743.62 × 71,495.36
  4. Step 4: Simplify right side
    128,080.40x = 12,636,348,739.60
  5. Step 5: Solve for x
    x = 12,636,348,739.60/128,080.40
  6. Step 6: Final answer
    x = 98,659.50

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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.