Home / 128,160.30-176,863.86-71,571.72

Finding the Fourth Proportional to 128,160.30, 176,863.86 and 71,571.72

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Solution

The fourth proportional to 128,160.30, 176,863.86 and 71,571.72 is: 98,770.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,160.30 : 176,863.86 = 71,571.72 : x
  2. Step 2: Convert to fraction form
    128,160.30/176,863.86 = 71,571.72/x
  3. Step 3: Cross multiply
    128,160.30x = 176,863.86 × 71,571.72
  4. Step 4: Simplify right side
    128,160.30x = 12,658,450,666.04
  5. Step 5: Solve for x
    x = 12,658,450,666.04/128,160.30
  6. Step 6: Final answer
    x = 98,770.45

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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.