Home / 128,522.10-177,355.65-71,160.28

Finding the Fourth Proportional to 128,522.10, 177,355.65 and 71,160.28

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Solution

The fourth proportional to 128,522.10, 177,355.65 and 71,160.28 is: 98,198.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,522.10 : 177,355.65 = 71,160.28 : x
  2. Step 2: Convert to fraction form
    128,522.10/177,355.65 = 71,160.28/x
  3. Step 3: Cross multiply
    128,522.10x = 177,355.65 × 71,160.28
  4. Step 4: Simplify right side
    128,522.10x = 12,620,677,713.58
  5. Step 5: Solve for x
    x = 12,620,677,713.58/128,522.10
  6. Step 6: Final answer
    x = 98,198.50

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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.