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Finding the Fourth Proportional to 128,846.79, 177,808.23 and 72,259.38

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Solution

The fourth proportional to 128,846.79, 177,808.23 and 72,259.38 is: 99,717.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,846.79 : 177,808.23 = 72,259.38 : x
  2. Step 2: Convert to fraction form
    128,846.79/177,808.23 = 72,259.38/x
  3. Step 3: Cross multiply
    128,846.79x = 177,808.23 × 72,259.38
  4. Step 4: Simplify right side
    128,846.79x = 12,848,312,458.70
  5. Step 5: Solve for x
    x = 12,848,312,458.70/128,846.79
  6. Step 6: Final answer
    x = 99,717.75

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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.