Home / 128,713.03-177,427.11-90,365.01

Finding the Fourth Proportional to 128,713.03, 177,427.11 and 90,365.01

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Solution

The fourth proportional to 128,713.03, 177,427.11 and 90,365.01 is: 124,565.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,713.03 : 177,427.11 = 90,365.01 : x
  2. Step 2: Convert to fraction form
    128,713.03/177,427.11 = 90,365.01/x
  3. Step 3: Cross multiply
    128,713.03x = 177,427.11 × 90,365.01
  4. Step 4: Simplify right side
    128,713.03x = 16,033,202,569.42
  5. Step 5: Solve for x
    x = 16,033,202,569.42/128,713.03
  6. Step 6: Final answer
    x = 124,565.50

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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.