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Finding the Fourth Proportional to 68,646.40, 94,715.72 and 39,948.68

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Solution

The fourth proportional to 68,646.40, 94,715.72 and 39,948.68 is: 55,119.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,646.40 : 94,715.72 = 39,948.68 : x
  2. Step 2: Convert to fraction form
    68,646.40/94,715.72 = 39,948.68/x
  3. Step 3: Cross multiply
    68,646.40x = 94,715.72 × 39,948.68
  4. Step 4: Simplify right side
    68,646.40x = 3,783,767,989.25
  5. Step 5: Solve for x
    x = 3,783,767,989.25/68,646.40
  6. Step 6: Final answer
    x = 55,119.69

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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.