Home / 128,412.34-177,250.17-90,181.15

Finding the Fourth Proportional to 128,412.34, 177,250.17 and 90,181.15

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Solution

The fourth proportional to 128,412.34, 177,250.17 and 90,181.15 is: 124,478.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,412.34 : 177,250.17 = 90,181.15 : x
  2. Step 2: Convert to fraction form
    128,412.34/177,250.17 = 90,181.15/x
  3. Step 3: Cross multiply
    128,412.34x = 177,250.17 × 90,181.15
  4. Step 4: Simplify right side
    128,412.34x = 15,984,624,063.35
  5. Step 5: Solve for x
    x = 15,984,624,063.35/128,412.34
  6. Step 6: Final answer
    x = 124,478.88

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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.