Home / 81,428.49-112,374.54-45,618.80

Finding the Fourth Proportional to 81,428.49, 112,374.54 and 45,618.80

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Solution

The fourth proportional to 81,428.49, 112,374.54 and 45,618.80 is: 62,955.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,428.49 : 112,374.54 = 45,618.80 : x
  2. Step 2: Convert to fraction form
    81,428.49/112,374.54 = 45,618.80/x
  3. Step 3: Cross multiply
    81,428.49x = 112,374.54 × 45,618.80
  4. Step 4: Simplify right side
    81,428.49x = 5,126,391,103.48
  5. Step 5: Solve for x
    x = 5,126,391,103.48/81,428.49
  6. Step 6: Final answer
    x = 62,955.74

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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.