Home / 128,575.78-177,433.41-71,988.10

Finding the Fourth Proportional to 128,575.78, 177,433.41 and 71,988.10

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Solution

The fourth proportional to 128,575.78, 177,433.41 and 71,988.10 is: 99,342.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,575.78 : 177,433.41 = 71,988.10 : x
  2. Step 2: Convert to fraction form
    128,575.78/177,433.41 = 71,988.10/x
  3. Step 3: Cross multiply
    128,575.78x = 177,433.41 × 71,988.10
  4. Step 4: Simplify right side
    128,575.78x = 12,773,094,062.42
  5. Step 5: Solve for x
    x = 12,773,094,062.42/128,575.78
  6. Step 6: Final answer
    x = 99,342.92

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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.