Home / 139,877.81-193,031.39-76,215.61

Finding the Fourth Proportional to 139,877.81, 193,031.39 and 76,215.61

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Solution

The fourth proportional to 139,877.81, 193,031.39 and 76,215.61 is: 105,177.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,877.81 : 193,031.39 = 76,215.61 : x
  2. Step 2: Convert to fraction form
    139,877.81/193,031.39 = 76,215.61/x
  3. Step 3: Cross multiply
    139,877.81x = 193,031.39 × 76,215.61
  4. Step 4: Simplify right side
    139,877.81x = 14,712,004,845.96
  5. Step 5: Solve for x
    x = 14,712,004,845.96/139,877.81
  6. Step 6: Final answer
    x = 105,177.55

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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.