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Finding the Fourth Proportional to 81,598.88, 112,564.56 and 54,421.76

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Solution

The fourth proportional to 81,598.88, 112,564.56 and 54,421.76 is: 75,074.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,598.88 : 112,564.56 = 54,421.76 : x
  2. Step 2: Convert to fraction form
    81,598.88/112,564.56 = 54,421.76/x
  3. Step 3: Cross multiply
    81,598.88x = 112,564.56 × 54,421.76
  4. Step 4: Simplify right side
    81,598.88x = 6,125,961,468.83
  5. Step 5: Solve for x
    x = 6,125,961,468.83/81,598.88
  6. Step 6: Final answer
    x = 75,074.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.