Home / 81,024.30-121,536.45-28,428.30

Finding the Fourth Proportional to 81,024.30, 121,536.45 and 28,428.30

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Solution

The fourth proportional to 81,024.30, 121,536.45 and 28,428.30 is: 42,642.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,024.30 : 121,536.45 = 28,428.30 : x
  2. Step 2: Convert to fraction form
    81,024.30/121,536.45 = 28,428.30/x
  3. Step 3: Cross multiply
    81,024.30x = 121,536.45 × 28,428.30
  4. Step 4: Simplify right side
    81,024.30x = 3,455,074,661.54
  5. Step 5: Solve for x
    x = 3,455,074,661.54/81,024.30
  6. Step 6: Final answer
    x = 42,642.45

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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.