Home / 81,025.23-121,549.98-28,425.45

Finding the Fourth Proportional to 81,025.23, 121,549.98 and 28,425.45

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Solution

The fourth proportional to 81,025.23, 121,549.98 and 28,425.45 is: 42,642.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,025.23 : 121,549.98 = 28,425.45 : x
  2. Step 2: Convert to fraction form
    81,025.23/121,549.98 = 28,425.45/x
  3. Step 3: Cross multiply
    81,025.23x = 121,549.98 × 28,425.45
  4. Step 4: Simplify right side
    81,025.23x = 3,455,112,878.99
  5. Step 5: Solve for x
    x = 3,455,112,878.99/81,025.23
  6. Step 6: Final answer
    x = 42,642.43

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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.