Home / 128,298.01-177,012.37-89,534.80

Finding the Fourth Proportional to 128,298.01, 177,012.37 and 89,534.80

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Solution

The fourth proportional to 128,298.01, 177,012.37 and 89,534.80 is: 123,530.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,298.01 : 177,012.37 = 89,534.80 : x
  2. Step 2: Convert to fraction form
    128,298.01/177,012.37 = 89,534.80/x
  3. Step 3: Cross multiply
    128,298.01x = 177,012.37 × 89,534.80
  4. Step 4: Simplify right side
    128,298.01x = 15,848,766,643.13
  5. Step 5: Solve for x
    x = 15,848,766,643.13/128,298.01
  6. Step 6: Final answer
    x = 123,530.89

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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.