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Finding the Fourth Proportional to 86,800.15, 119,717.97 and 74,720.47

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Solution

The fourth proportional to 86,800.15, 119,717.97 and 74,720.47 is: 103,057.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,800.15 : 119,717.97 = 74,720.47 : x
  2. Step 2: Convert to fraction form
    86,800.15/119,717.97 = 74,720.47/x
  3. Step 3: Cross multiply
    86,800.15x = 119,717.97 × 74,720.47
  4. Step 4: Simplify right side
    86,800.15x = 8,945,382,985.85
  5. Step 5: Solve for x
    x = 8,945,382,985.85/86,800.15
  6. Step 6: Final answer
    x = 103,057.23

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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.