Home / 81,880.08-122,876.49-28,572.36

Finding the Fourth Proportional to 81,880.08, 122,876.49 and 28,572.36

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Solution

The fourth proportional to 81,880.08, 122,876.49 and 28,572.36 is: 42,878.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,880.08 : 122,876.49 = 28,572.36 : x
  2. Step 2: Convert to fraction form
    81,880.08/122,876.49 = 28,572.36/x
  3. Step 3: Cross multiply
    81,880.08x = 122,876.49 × 28,572.36
  4. Step 4: Simplify right side
    81,880.08x = 3,510,871,307.82
  5. Step 5: Solve for x
    x = 3,510,871,307.82/81,880.08
  6. Step 6: Final answer
    x = 42,878.21

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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.