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Finding the Fourth Proportional to 70,391.40, 105,528.70 and 26,009.80

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Solution

The fourth proportional to 70,391.40, 105,528.70 and 26,009.80 is: 38,993.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,391.40 : 105,528.70 = 26,009.80 : x
  2. Step 2: Convert to fraction form
    70,391.40/105,528.70 = 26,009.80/x
  3. Step 3: Cross multiply
    70,391.40x = 105,528.70 × 26,009.80
  4. Step 4: Simplify right side
    70,391.40x = 2,744,780,381.26
  5. Step 5: Solve for x
    x = 2,744,780,381.26/70,391.40
  6. Step 6: Final answer
    x = 38,993.12

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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.