Home / 77,820.49-108,117.29-76,887.37

Finding the Fourth Proportional to 77,820.49, 108,117.29 and 76,887.37

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Solution

The fourth proportional to 77,820.49, 108,117.29 and 76,887.37 is: 106,820.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,820.49 : 108,117.29 = 76,887.37 : x
  2. Step 2: Convert to fraction form
    77,820.49/108,117.29 = 76,887.37/x
  3. Step 3: Cross multiply
    77,820.49x = 108,117.29 × 76,887.37
  4. Step 4: Simplify right side
    77,820.49x = 8,312,853,887.41
  5. Step 5: Solve for x
    x = 8,312,853,887.41/77,820.49
  6. Step 6: Final answer
    x = 106,820.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.