Home / 128,576.03-177,433.76-71,988.35

Finding the Fourth Proportional to 128,576.03, 177,433.76 and 71,988.35

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Solution

The fourth proportional to 128,576.03, 177,433.76 and 71,988.35 is: 99,343.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,576.03 : 177,433.76 = 71,988.35 : x
  2. Step 2: Convert to fraction form
    128,576.03/177,433.76 = 71,988.35/x
  3. Step 3: Cross multiply
    128,576.03x = 177,433.76 × 71,988.35
  4. Step 4: Simplify right side
    128,576.03x = 12,773,163,256.75
  5. Step 5: Solve for x
    x = 12,773,163,256.75/128,576.03
  6. Step 6: Final answer
    x = 99,343.27

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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.