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Finding the Fourth Proportional to 128,299.60, 177,059.08 and 71,710.80

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Solution

The fourth proportional to 128,299.60, 177,059.08 and 71,710.80 is: 98,964.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,299.60 : 177,059.08 = 71,710.80 : x
  2. Step 2: Convert to fraction form
    128,299.60/177,059.08 = 71,710.80/x
  3. Step 3: Cross multiply
    128,299.60x = 177,059.08 × 71,710.80
  4. Step 4: Simplify right side
    128,299.60x = 12,697,048,274.06
  5. Step 5: Solve for x
    x = 12,697,048,274.06/128,299.60
  6. Step 6: Final answer
    x = 98,964.05

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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.