Home / 128,576.32-177,433.34-71,989.72

Finding the Fourth Proportional to 128,576.32, 177,433.34 and 71,989.72

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Solution

The fourth proportional to 128,576.32, 177,433.34 and 71,989.72 is: 99,344.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,576.32 : 177,433.34 = 71,989.72 : x
  2. Step 2: Convert to fraction form
    128,576.32/177,433.34 = 71,989.72/x
  3. Step 3: Cross multiply
    128,576.32x = 177,433.34 × 71,989.72
  4. Step 4: Simplify right side
    128,576.32x = 12,773,376,465.26
  5. Step 5: Solve for x
    x = 12,773,376,465.26/128,576.32
  6. Step 6: Final answer
    x = 99,344.70

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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.