Home / 128,870.06-177,832.14-71,505.75

Finding the Fourth Proportional to 128,870.06, 177,832.14 and 71,505.75

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Solution

The fourth proportional to 128,870.06, 177,832.14 and 71,505.75 is: 98,673.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,870.06 : 177,832.14 = 71,505.75 : x
  2. Step 2: Convert to fraction form
    128,870.06/177,832.14 = 71,505.75/x
  3. Step 3: Cross multiply
    128,870.06x = 177,832.14 × 71,505.75
  4. Step 4: Simplify right side
    128,870.06x = 12,716,020,544.81
  5. Step 5: Solve for x
    x = 12,716,020,544.81/128,870.06
  6. Step 6: Final answer
    x = 98,673.19

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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.