Home / 81,931.72-122,927.10-42,514.60

Finding the Fourth Proportional to 81,931.72, 122,927.10 and 42,514.60

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Solution

The fourth proportional to 81,931.72, 122,927.10 and 42,514.60 is: 63,787.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,931.72 : 122,927.10 = 42,514.60 : x
  2. Step 2: Convert to fraction form
    81,931.72/122,927.10 = 42,514.60/x
  3. Step 3: Cross multiply
    81,931.72x = 122,927.10 × 42,514.60
  4. Step 4: Simplify right side
    81,931.72x = 5,226,196,485.66
  5. Step 5: Solve for x
    x = 5,226,196,485.66/81,931.72
  6. Step 6: Final answer
    x = 63,787.22

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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.