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Finding the Fourth Proportional to 128,404.96, 192,569.83 and 48,385.20

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Solution

The fourth proportional to 128,404.96, 192,569.83 and 48,385.20 is: 72,563.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,404.96 : 192,569.83 = 48,385.20 : x
  2. Step 2: Convert to fraction form
    128,404.96/192,569.83 = 48,385.20/x
  3. Step 3: Cross multiply
    128,404.96x = 192,569.83 × 48,385.20
  4. Step 4: Simplify right side
    128,404.96x = 9,317,528,533.74
  5. Step 5: Solve for x
    x = 9,317,528,533.74/128,404.96
  6. Step 6: Final answer
    x = 72,563.62

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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.