Home / 129,669.85-178,937.48-72,315.06

Finding the Fourth Proportional to 129,669.85, 178,937.48 and 72,315.06

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Solution

The fourth proportional to 129,669.85, 178,937.48 and 72,315.06 is: 99,790.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,669.85 : 178,937.48 = 72,315.06 : x
  2. Step 2: Convert to fraction form
    129,669.85/178,937.48 = 72,315.06/x
  3. Step 3: Cross multiply
    129,669.85x = 178,937.48 × 72,315.06
  4. Step 4: Simplify right side
    129,669.85x = 12,939,874,783.24
  5. Step 5: Solve for x
    x = 12,939,874,783.24/129,669.85
  6. Step 6: Final answer
    x = 99,790.93

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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.