Home / 128,085.10-176,756.75-74,383.31

Finding the Fourth Proportional to 128,085.10, 176,756.75 and 74,383.31

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Solution

The fourth proportional to 128,085.10, 176,756.75 and 74,383.31 is: 102,648.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,085.10 : 176,756.75 = 74,383.31 : x
  2. Step 2: Convert to fraction form
    128,085.10/176,756.75 = 74,383.31/x
  3. Step 3: Cross multiply
    128,085.10x = 176,756.75 × 74,383.31
  4. Step 4: Simplify right side
    128,085.10x = 13,147,752,129.84
  5. Step 5: Solve for x
    x = 13,147,752,129.84/128,085.10
  6. Step 6: Final answer
    x = 102,648.57

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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.