Home / 102,081.29-140,878.55-56,769.40

Finding the Fourth Proportional to 102,081.29, 140,878.55 and 56,769.40

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Solution

The fourth proportional to 102,081.29, 140,878.55 and 56,769.40 is: 78,345.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,081.29 : 140,878.55 = 56,769.40 : x
  2. Step 2: Convert to fraction form
    102,081.29/140,878.55 = 56,769.40/x
  3. Step 3: Cross multiply
    102,081.29x = 140,878.55 × 56,769.40
  4. Step 4: Simplify right side
    102,081.29x = 7,997,589,768.13
  5. Step 5: Solve for x
    x = 7,997,589,768.13/102,081.29
  6. Step 6: Final answer
    x = 78,345.30

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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.