Home / 76,855.83-115,275.07-20,700.05

Finding the Fourth Proportional to 76,855.83, 115,275.07 and 20,700.05

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Solution

The fourth proportional to 76,855.83, 115,275.07 and 20,700.05 is: 31,047.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,855.83 : 115,275.07 = 20,700.05 : x
  2. Step 2: Convert to fraction form
    76,855.83/115,275.07 = 20,700.05/x
  3. Step 3: Cross multiply
    76,855.83x = 115,275.07 × 20,700.05
  4. Step 4: Simplify right side
    76,855.83x = 2,386,199,045.82
  5. Step 5: Solve for x
    x = 2,386,199,045.82/76,855.83
  6. Step 6: Final answer
    x = 31,047.73

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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.