Home / 81,310.78-121,966.20-53,602.30

Finding the Fourth Proportional to 81,310.78, 121,966.20 and 53,602.30

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Solution

The fourth proportional to 81,310.78, 121,966.20 and 53,602.30 is: 80,403.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,310.78 : 121,966.20 = 53,602.30 : x
  2. Step 2: Convert to fraction form
    81,310.78/121,966.20 = 53,602.30/x
  3. Step 3: Cross multiply
    81,310.78x = 121,966.20 × 53,602.30
  4. Step 4: Simplify right side
    81,310.78x = 6,537,668,842.26
  5. Step 5: Solve for x
    x = 6,537,668,842.26/81,310.78
  6. Step 6: Final answer
    x = 80,403.47

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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.