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Finding the Fourth Proportional to 93,639.20, 140,458.80 and 81,975.20

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Solution

The fourth proportional to 93,639.20, 140,458.80 and 81,975.20 is: 122,962.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,639.20 : 140,458.80 = 81,975.20 : x
  2. Step 2: Convert to fraction form
    93,639.20/140,458.80 = 81,975.20/x
  3. Step 3: Cross multiply
    93,639.20x = 140,458.80 × 81,975.20
  4. Step 4: Simplify right side
    93,639.20x = 11,514,138,221.76
  5. Step 5: Solve for x
    x = 11,514,138,221.76/93,639.20
  6. Step 6: Final answer
    x = 122,962.80

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1.5x scale

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.