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Finding the Fourth Proportional to 77,215.52, 115,786.29 and 37,726.40

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Solution

The fourth proportional to 77,215.52, 115,786.29 and 37,726.40 is: 56,571.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,215.52 : 115,786.29 = 37,726.40 : x
  2. Step 2: Convert to fraction form
    77,215.52/115,786.29 = 37,726.40/x
  3. Step 3: Cross multiply
    77,215.52x = 115,786.29 × 37,726.40
  4. Step 4: Simplify right side
    77,215.52x = 4,368,199,891.06
  5. Step 5: Solve for x
    x = 4,368,199,891.06/77,215.52
  6. Step 6: Final answer
    x = 56,571.53

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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.