Home / 85,977.87-128,784.98-54,371.63

Finding the Fourth Proportional to 85,977.87, 128,784.98 and 54,371.63

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Solution

The fourth proportional to 85,977.87, 128,784.98 and 54,371.63 is: 81,442.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,977.87 : 128,784.98 = 54,371.63 : x
  2. Step 2: Convert to fraction form
    85,977.87/128,784.98 = 54,371.63/x
  3. Step 3: Cross multiply
    85,977.87x = 128,784.98 × 54,371.63
  4. Step 4: Simplify right side
    85,977.87x = 7,002,248,366.33
  5. Step 5: Solve for x
    x = 7,002,248,366.33/85,977.87
  6. Step 6: Final answer
    x = 81,442.45

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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.