Home / 128,741.23-177,653.10-72,141.67

Finding the Fourth Proportional to 128,741.23, 177,653.10 and 72,141.67

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Solution

The fourth proportional to 128,741.23, 177,653.10 and 72,141.67 is: 99,550.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,741.23 : 177,653.10 = 72,141.67 : x
  2. Step 2: Convert to fraction form
    128,741.23/177,653.10 = 72,141.67/x
  3. Step 3: Cross multiply
    128,741.23x = 177,653.10 × 72,141.67
  4. Step 4: Simplify right side
    128,741.23x = 12,816,191,314.68
  5. Step 5: Solve for x
    x = 12,816,191,314.68/128,741.23
  6. Step 6: Final answer
    x = 99,550.01

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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.