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Finding the Fourth Proportional to 70,068.90, 105,091.20 and 25,672.80

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Solution

The fourth proportional to 70,068.90, 105,091.20 and 25,672.80 is: 38,504.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,068.90 : 105,091.20 = 25,672.80 : x
  2. Step 2: Convert to fraction form
    70,068.90/105,091.20 = 25,672.80/x
  3. Step 3: Cross multiply
    70,068.90x = 105,091.20 × 25,672.80
  4. Step 4: Simplify right side
    70,068.90x = 2,697,985,359.36
  5. Step 5: Solve for x
    x = 2,697,985,359.36/70,068.90
  6. Step 6: Final answer
    x = 38,504.75

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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.