Home / 129,670.13-178,947.94-72,308.89

Finding the Fourth Proportional to 129,670.13, 178,947.94 and 72,308.89

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Solution

The fourth proportional to 129,670.13, 178,947.94 and 72,308.89 is: 99,788.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,670.13 : 178,947.94 = 72,308.89 : x
  2. Step 2: Convert to fraction form
    129,670.13/178,947.94 = 72,308.89/x
  3. Step 3: Cross multiply
    129,670.13x = 178,947.94 × 72,308.89
  4. Step 4: Simplify right side
    129,670.13x = 12,939,526,281.04
  5. Step 5: Solve for x
    x = 12,939,526,281.04/129,670.13
  6. Step 6: Final answer
    x = 99,788.03

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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.