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Finding the Fourth Proportional to 77,091.40, 115,581.16 and 52,068.88

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Solution

The fourth proportional to 77,091.40, 115,581.16 and 52,068.88 is: 78,065.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,091.40 : 115,581.16 = 52,068.88 : x
  2. Step 2: Convert to fraction form
    77,091.40/115,581.16 = 52,068.88/x
  3. Step 3: Cross multiply
    77,091.40x = 115,581.16 × 52,068.88
  4. Step 4: Simplify right side
    77,091.40x = 6,018,181,550.30
  5. Step 5: Solve for x
    x = 6,018,181,550.30/77,091.40
  6. Step 6: Final answer
    x = 78,065.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.