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Finding the Fourth Proportional to 128,607.54, 177,473.43 and 72,016.02

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Solution

The fourth proportional to 128,607.54, 177,473.43 and 72,016.02 is: 99,379.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,607.54 : 177,473.43 = 72,016.02 : x
  2. Step 2: Convert to fraction form
    128,607.54/177,473.43 = 72,016.02/x
  3. Step 3: Cross multiply
    128,607.54x = 177,473.43 × 72,016.02
  4. Step 4: Simplify right side
    128,607.54x = 12,780,930,084.35
  5. Step 5: Solve for x
    x = 12,780,930,084.35/128,607.54
  6. Step 6: Final answer
    x = 99,379.32

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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.