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Finding the Fourth Proportional to 76,616.72, 114,925.10 and 21,212.72

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Solution

The fourth proportional to 76,616.72, 114,925.10 and 21,212.72 is: 31,819.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,616.72 : 114,925.10 = 21,212.72 : x
  2. Step 2: Convert to fraction form
    76,616.72/114,925.10 = 21,212.72/x
  3. Step 3: Cross multiply
    76,616.72x = 114,925.10 × 21,212.72
  4. Step 4: Simplify right side
    76,616.72x = 2,437,873,717.55
  5. Step 5: Solve for x
    x = 2,437,873,717.55/76,616.72
  6. Step 6: Final answer
    x = 31,819.08

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1.5x scale

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.