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Finding the Fourth Proportional to 92,979, 128,310.54 and 50,537.76

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Solution

The fourth proportional to 92,979, 128,310.54 and 50,537.76 is: 69,741.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,979 : 128,310.54 = 50,537.76 : x
  2. Step 2: Convert to fraction form
    92,979/128,310.54 = 50,537.76/x
  3. Step 3: Cross multiply
    92,979x = 128,310.54 × 50,537.76
  4. Step 4: Simplify right side
    92,979x = 6,484,527,275.99
  5. Step 5: Solve for x
    x = 6,484,527,275.99/92,979
  6. Step 6: Final answer
    x = 69,741.85

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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.