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Finding the Fourth Proportional to 68,538.40, 94,582.80 and 38,730.40

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Solution

The fourth proportional to 68,538.40, 94,582.80 and 38,730.40 is: 53,447.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,538.40 : 94,582.80 = 38,730.40 : x
  2. Step 2: Convert to fraction form
    68,538.40/94,582.80 = 38,730.40/x
  3. Step 3: Cross multiply
    68,538.40x = 94,582.80 × 38,730.40
  4. Step 4: Simplify right side
    68,538.40x = 3,663,229,677.12
  5. Step 5: Solve for x
    x = 3,663,229,677.12/68,538.40
  6. Step 6: Final answer
    x = 53,447.84

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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.