Home / 128,090.40-176,757.42-71,505.36

Finding the Fourth Proportional to 128,090.40, 176,757.42 and 71,505.36

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Solution

The fourth proportional to 128,090.40, 176,757.42 and 71,505.36 is: 98,673.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,090.40 : 176,757.42 = 71,505.36 : x
  2. Step 2: Convert to fraction form
    128,090.40/176,757.42 = 71,505.36/x
  3. Step 3: Cross multiply
    128,090.40x = 176,757.42 × 71,505.36
  4. Step 4: Simplify right side
    128,090.40x = 12,639,102,949.77
  5. Step 5: Solve for x
    x = 12,639,102,949.77/128,090.40
  6. Step 6: Final answer
    x = 98,673.30

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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.