Home / 129,577.59-178,820.03-72,222.81

Finding the Fourth Proportional to 129,577.59, 178,820.03 and 72,222.81

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Solution

The fourth proportional to 129,577.59, 178,820.03 and 72,222.81 is: 99,669.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,577.59 : 178,820.03 = 72,222.81 : x
  2. Step 2: Convert to fraction form
    129,577.59/178,820.03 = 72,222.81/x
  3. Step 3: Cross multiply
    129,577.59x = 178,820.03 × 72,222.81
  4. Step 4: Simplify right side
    129,577.59x = 12,914,885,050.88
  5. Step 5: Solve for x
    x = 12,914,885,050.88/129,577.59
  6. Step 6: Final answer
    x = 99,669.13

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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.