Home / 128,438.93-177,241.37-71,080.67

Finding the Fourth Proportional to 128,438.93, 177,241.37 and 71,080.67

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Solution

The fourth proportional to 128,438.93, 177,241.37 and 71,080.67 is: 98,088.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,438.93 : 177,241.37 = 71,080.67 : x
  2. Step 2: Convert to fraction form
    128,438.93/177,241.37 = 71,080.67/x
  3. Step 3: Cross multiply
    128,438.93x = 177,241.37 × 71,080.67
  4. Step 4: Simplify right side
    128,438.93x = 12,598,434,089.71
  5. Step 5: Solve for x
    x = 12,598,434,089.71/128,438.93
  6. Step 6: Final answer
    x = 98,088.91

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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.