Home / 81,423.09-112,372.11-45,619.47

Finding the Fourth Proportional to 81,423.09, 112,372.11 and 45,619.47

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Solution

The fourth proportional to 81,423.09, 112,372.11 and 45,619.47 is: 62,959.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,423.09 : 112,372.11 = 45,619.47 : x
  2. Step 2: Convert to fraction form
    81,423.09/112,372.11 = 45,619.47/x
  3. Step 3: Cross multiply
    81,423.09x = 112,372.11 × 45,619.47
  4. Step 4: Simplify right side
    81,423.09x = 5,126,356,100.98
  5. Step 5: Solve for x
    x = 5,126,356,100.98/81,423.09
  6. Step 6: Final answer
    x = 62,959.49

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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.