Home / 129,254.79-178,379.82-72,669.81

Finding the Fourth Proportional to 129,254.79, 178,379.82 and 72,669.81

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Solution

The fourth proportional to 129,254.79, 178,379.82 and 72,669.81 is: 100,288.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,254.79 : 178,379.82 = 72,669.81 : x
  2. Step 2: Convert to fraction form
    129,254.79/178,379.82 = 72,669.81/x
  3. Step 3: Cross multiply
    129,254.79x = 178,379.82 × 72,669.81
  4. Step 4: Simplify right side
    129,254.79x = 12,962,827,627.23
  5. Step 5: Solve for x
    x = 12,962,827,627.23/129,254.79
  6. Step 6: Final answer
    x = 100,288.95

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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.