Home / 128,434.46-177,239.70-71,076.15

Finding the Fourth Proportional to 128,434.46, 177,239.70 and 71,076.15

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Solution

The fourth proportional to 128,434.46, 177,239.70 and 71,076.15 is: 98,085.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,434.46 : 177,239.70 = 71,076.15 : x
  2. Step 2: Convert to fraction form
    128,434.46/177,239.70 = 71,076.15/x
  3. Step 3: Cross multiply
    128,434.46x = 177,239.70 × 71,076.15
  4. Step 4: Simplify right side
    128,434.46x = 12,597,515,503.16
  5. Step 5: Solve for x
    x = 12,597,515,503.16/128,434.46
  6. Step 6: Final answer
    x = 98,085.17

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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.