Home / 128,310.80-177,063.32-70,166.48

Finding the Fourth Proportional to 128,310.80, 177,063.32 and 70,166.48

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Solution

The fourth proportional to 128,310.80, 177,063.32 and 70,166.48 is: 96,826.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,310.80 : 177,063.32 = 70,166.48 : x
  2. Step 2: Convert to fraction form
    128,310.80/177,063.32 = 70,166.48/x
  3. Step 3: Cross multiply
    128,310.80x = 177,063.32 × 70,166.48
  4. Step 4: Simplify right side
    128,310.80x = 12,423,909,901.51
  5. Step 5: Solve for x
    x = 12,423,909,901.51/128,310.80
  6. Step 6: Final answer
    x = 96,826.69

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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.