Home / 81,131.67-112,038.39-76,713.93

Finding the Fourth Proportional to 81,131.67, 112,038.39 and 76,713.93

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Solution

The fourth proportional to 81,131.67, 112,038.39 and 76,713.93 is: 105,937.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,131.67 : 112,038.39 = 76,713.93 : x
  2. Step 2: Convert to fraction form
    81,131.67/112,038.39 = 76,713.93/x
  3. Step 3: Cross multiply
    81,131.67x = 112,038.39 × 76,713.93
  4. Step 4: Simplify right side
    81,131.67x = 8,594,905,207.77
  5. Step 5: Solve for x
    x = 8,594,905,207.77/81,131.67
  6. Step 6: Final answer
    x = 105,937.73

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1.5x scale

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.