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Finding the Fourth Proportional to 89,885.60, 124,066.80 and 52,172

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Solution

The fourth proportional to 89,885.60, 124,066.80 and 52,172 is: 72,011.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,885.60 : 124,066.80 = 52,172 : x
  2. Step 2: Convert to fraction form
    89,885.60/124,066.80 = 52,172/x
  3. Step 3: Cross multiply
    89,885.60x = 124,066.80 × 52,172
  4. Step 4: Simplify right side
    89,885.60x = 6,472,813,089.60
  5. Step 5: Solve for x
    x = 6,472,813,089.60/89,885.60
  6. Step 6: Final answer
    x = 72,011.68

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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.