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Finding the Fourth Proportional to 128,596.76, 177,469.44 and 72,008.14

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Solution

The fourth proportional to 128,596.76, 177,469.44 and 72,008.14 is: 99,374.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,596.76 : 177,469.44 = 72,008.14 : x
  2. Step 2: Convert to fraction form
    128,596.76/177,469.44 = 72,008.14/x
  3. Step 3: Cross multiply
    128,596.76x = 177,469.44 × 72,008.14
  4. Step 4: Simplify right side
    128,596.76x = 12,779,244,281.24
  5. Step 5: Solve for x
    x = 12,779,244,281.24/128,596.76
  6. Step 6: Final answer
    x = 99,374.54

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1.5x scale

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.