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Finding the Fourth Proportional to 93,458.92, 140,330.70 and 90,430

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Solution

The fourth proportional to 93,458.92, 140,330.70 and 90,430 is: 135,782.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,458.92 : 140,330.70 = 90,430 : x
  2. Step 2: Convert to fraction form
    93,458.92/140,330.70 = 90,430/x
  3. Step 3: Cross multiply
    93,458.92x = 140,330.70 × 90,430
  4. Step 4: Simplify right side
    93,458.92x = 12,690,105,201.00
  5. Step 5: Solve for x
    x = 12,690,105,201.00/93,458.92
  6. Step 6: Final answer
    x = 135,782.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.