Home / 128,344.50-177,111.18-70,982.91

Finding the Fourth Proportional to 128,344.50, 177,111.18 and 70,982.91

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Solution

The fourth proportional to 128,344.50, 177,111.18 and 70,982.91 is: 97,954.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,344.50 : 177,111.18 = 70,982.91 : x
  2. Step 2: Convert to fraction form
    128,344.50/177,111.18 = 70,982.91/x
  3. Step 3: Cross multiply
    128,344.50x = 177,111.18 × 70,982.91
  4. Step 4: Simplify right side
    128,344.50x = 12,571,866,949.93
  5. Step 5: Solve for x
    x = 12,571,866,949.93/128,344.50
  6. Step 6: Final answer
    x = 97,954.08

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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.