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Finding the Fourth Proportional to 92,909.87, 128,215.71 and 50,468.40

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Solution

The fourth proportional to 92,909.87, 128,215.71 and 50,468.40 is: 69,646.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,909.87 : 128,215.71 = 50,468.40 : x
  2. Step 2: Convert to fraction form
    92,909.87/128,215.71 = 50,468.40/x
  3. Step 3: Cross multiply
    92,909.87x = 128,215.71 × 50,468.40
  4. Step 4: Simplify right side
    92,909.87x = 6,470,841,738.56
  5. Step 5: Solve for x
    x = 6,470,841,738.56/92,909.87
  6. Step 6: Final answer
    x = 69,646.44

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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.