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Finding the Fourth Proportional to 93,919.61, 129,780.90 and 68,381.64

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Solution

The fourth proportional to 93,919.61, 129,780.90 and 68,381.64 is: 94,491.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,919.61 : 129,780.90 = 68,381.64 : x
  2. Step 2: Convert to fraction form
    93,919.61/129,780.90 = 68,381.64/x
  3. Step 3: Cross multiply
    93,919.61x = 129,780.90 × 68,381.64
  4. Step 4: Simplify right side
    93,919.61x = 8,874,630,782.68
  5. Step 5: Solve for x
    x = 8,874,630,782.68/93,919.61
  6. Step 6: Final answer
    x = 94,491.78

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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.