Home / 81,275.50-121,913.26-53,371.80

Finding the Fourth Proportional to 81,275.50, 121,913.26 and 53,371.80

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Solution

The fourth proportional to 81,275.50, 121,913.26 and 53,371.80 is: 80,057.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,275.50 : 121,913.26 = 53,371.80 : x
  2. Step 2: Convert to fraction form
    81,275.50/121,913.26 = 53,371.80/x
  3. Step 3: Cross multiply
    81,275.50x = 121,913.26 × 53,371.80
  4. Step 4: Simplify right side
    81,275.50x = 6,506,730,130.07
  5. Step 5: Solve for x
    x = 6,506,730,130.07/81,275.50
  6. Step 6: Final answer
    x = 80,057.71

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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.