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Finding the Fourth Proportional to 70,407.20, 105,499.68 and 25,972.80

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Solution

The fourth proportional to 70,407.20, 105,499.68 and 25,972.80 is: 38,918.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,407.20 : 105,499.68 = 25,972.80 : x
  2. Step 2: Convert to fraction form
    70,407.20/105,499.68 = 25,972.80/x
  3. Step 3: Cross multiply
    70,407.20x = 105,499.68 × 25,972.80
  4. Step 4: Simplify right side
    70,407.20x = 2,740,122,088.70
  5. Step 5: Solve for x
    x = 2,740,122,088.70/70,407.20
  6. Step 6: Final answer
    x = 38,918.21

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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.