Home / 128,365.83-177,131.21-70,996.03

Finding the Fourth Proportional to 128,365.83, 177,131.21 and 70,996.03

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Solution

The fourth proportional to 128,365.83, 177,131.21 and 70,996.03 is: 97,966.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,365.83 : 177,131.21 = 70,996.03 : x
  2. Step 2: Convert to fraction form
    128,365.83/177,131.21 = 70,996.03/x
  3. Step 3: Cross multiply
    128,365.83x = 177,131.21 × 70,996.03
  4. Step 4: Simplify right side
    128,365.83x = 12,575,613,882.92
  5. Step 5: Solve for x
    x = 12,575,613,882.92/128,365.83
  6. Step 6: Final answer
    x = 97,966.99

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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.