Home / 81,283.50-121,814.55-45,761.76

Finding the Fourth Proportional to 81,283.50, 121,814.55 and 45,761.76

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Solution

The fourth proportional to 81,283.50, 121,814.55 and 45,761.76 is: 68,580.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,283.50 : 121,814.55 = 45,761.76 : x
  2. Step 2: Convert to fraction form
    81,283.50/121,814.55 = 45,761.76/x
  3. Step 3: Cross multiply
    81,283.50x = 121,814.55 × 45,761.76
  4. Step 4: Simplify right side
    81,283.50x = 5,574,448,201.61
  5. Step 5: Solve for x
    x = 5,574,448,201.61/81,283.50
  6. Step 6: Final answer
    x = 68,580.32

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1.5x scale

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.