Home / 81,106.76-121,666.64-28,528.04

Finding the Fourth Proportional to 81,106.76, 121,666.64 and 28,528.04

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Solution

The fourth proportional to 81,106.76, 121,666.64 and 28,528.04 is: 42,794.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,106.76 : 121,666.64 = 28,528.04 : x
  2. Step 2: Convert to fraction form
    81,106.76/121,666.64 = 28,528.04/x
  3. Step 3: Cross multiply
    81,106.76x = 121,666.64 × 28,528.04
  4. Step 4: Simplify right side
    81,106.76x = 3,470,910,772.59
  5. Step 5: Solve for x
    x = 3,470,910,772.59/81,106.76
  6. Step 6: Final answer
    x = 42,794.35

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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.