Home / 84,428.40-126,665.64-28,277.76

Finding the Fourth Proportional to 84,428.40, 126,665.64 and 28,277.76

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Solution

The fourth proportional to 84,428.40, 126,665.64 and 28,277.76 is: 42,424.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,428.40 : 126,665.64 = 28,277.76 : x
  2. Step 2: Convert to fraction form
    84,428.40/126,665.64 = 28,277.76/x
  3. Step 3: Cross multiply
    84,428.40x = 126,665.64 × 28,277.76
  4. Step 4: Simplify right side
    84,428.40x = 3,581,820,568.17
  5. Step 5: Solve for x
    x = 3,581,820,568.17/84,428.40
  6. Step 6: Final answer
    x = 42,424.36

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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.