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Finding the Fourth Proportional to 70,387.40, 105,522.70 and 26,005.80

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Solution

The fourth proportional to 70,387.40, 105,522.70 and 26,005.80 is: 38,987.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,387.40 : 105,522.70 = 26,005.80 : x
  2. Step 2: Convert to fraction form
    70,387.40/105,522.70 = 26,005.80/x
  3. Step 3: Cross multiply
    70,387.40x = 105,522.70 × 26,005.80
  4. Step 4: Simplify right side
    70,387.40x = 2,744,202,231.66
  5. Step 5: Solve for x
    x = 2,744,202,231.66/70,387.40
  6. Step 6: Final answer
    x = 38,987.12

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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.