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Finding the Fourth Proportional to 70,142.71, 105,228.45 and 25,769.89

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Solution

The fourth proportional to 70,142.71, 105,228.45 and 25,769.89 is: 38,660.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,142.71 : 105,228.45 = 25,769.89 : x
  2. Step 2: Convert to fraction form
    70,142.71/105,228.45 = 25,769.89/x
  3. Step 3: Cross multiply
    70,142.71x = 105,228.45 × 25,769.89
  4. Step 4: Simplify right side
    70,142.71x = 2,711,725,581.37
  5. Step 5: Solve for x
    x = 2,711,725,581.37/70,142.71
  6. Step 6: Final answer
    x = 38,660.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.