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Finding the Fourth Proportional to 77,246.80, 115,670.40 and 64,736.80

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Solution

The fourth proportional to 77,246.80, 115,670.40 and 64,736.80 is: 96,937.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,246.80 : 115,670.40 = 64,736.80 : x
  2. Step 2: Convert to fraction form
    77,246.80/115,670.40 = 64,736.80/x
  3. Step 3: Cross multiply
    77,246.80x = 115,670.40 × 64,736.80
  4. Step 4: Simplify right side
    77,246.80x = 7,488,131,550.72
  5. Step 5: Solve for x
    x = 7,488,131,550.72/77,246.80
  6. Step 6: Final answer
    x = 96,937.76

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1.5x scale

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.