Home / 128,842.07-177,740.70-85,841.51

Finding the Fourth Proportional to 128,842.07, 177,740.70 and 85,841.51

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Solution

The fourth proportional to 128,842.07, 177,740.70 and 85,841.51 is: 118,420.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,842.07 : 177,740.70 = 85,841.51 : x
  2. Step 2: Convert to fraction form
    128,842.07/177,740.70 = 85,841.51/x
  3. Step 3: Cross multiply
    128,842.07x = 177,740.70 × 85,841.51
  4. Step 4: Simplify right side
    128,842.07x = 15,257,530,076.46
  5. Step 5: Solve for x
    x = 15,257,530,076.46/128,842.07
  6. Step 6: Final answer
    x = 118,420.40

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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.