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Finding the Fourth Proportional to 128,753.75, 177,582.58 and 112,810.52

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Solution

The fourth proportional to 128,753.75, 177,582.58 and 112,810.52 is: 155,593.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,753.75 : 177,582.58 = 112,810.52 : x
  2. Step 2: Convert to fraction form
    128,753.75/177,582.58 = 112,810.52/x
  3. Step 3: Cross multiply
    128,753.75x = 177,582.58 × 112,810.52
  4. Step 4: Simplify right side
    128,753.75x = 20,033,183,354.67
  5. Step 5: Solve for x
    x = 20,033,183,354.67/128,753.75
  6. Step 6: Final answer
    x = 155,593.01

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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.