Home / 129,215.98-178,334.02-78,230.63

Finding the Fourth Proportional to 129,215.98, 178,334.02 and 78,230.63

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Solution

The fourth proportional to 129,215.98, 178,334.02 and 78,230.63 is: 107,967.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,215.98 : 178,334.02 = 78,230.63 : x
  2. Step 2: Convert to fraction form
    129,215.98/178,334.02 = 78,230.63/x
  3. Step 3: Cross multiply
    129,215.98x = 178,334.02 × 78,230.63
  4. Step 4: Simplify right side
    129,215.98x = 13,951,182,735.03
  5. Step 5: Solve for x
    x = 13,951,182,735.03/129,215.98
  6. Step 6: Final answer
    x = 107,967.94

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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.