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Finding the Fourth Proportional to 93,031.12, 128,382.04 and 50,590

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Solution

The fourth proportional to 93,031.12, 128,382.04 and 50,590 is: 69,813.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,031.12 : 128,382.04 = 50,590 : x
  2. Step 2: Convert to fraction form
    93,031.12/128,382.04 = 50,590/x
  3. Step 3: Cross multiply
    93,031.12x = 128,382.04 × 50,590
  4. Step 4: Simplify right side
    93,031.12x = 6,494,847,403.60
  5. Step 5: Solve for x
    x = 6,494,847,403.60/93,031.12
  6. Step 6: Final answer
    x = 69,813.71

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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.