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Finding the Fourth Proportional to 70,849.32, 97,772.76 and 39,019.20

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Solution

The fourth proportional to 70,849.32, 97,772.76 and 39,019.20 is: 53,846.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,849.32 : 97,772.76 = 39,019.20 : x
  2. Step 2: Convert to fraction form
    70,849.32/97,772.76 = 39,019.20/x
  3. Step 3: Cross multiply
    70,849.32x = 97,772.76 × 39,019.20
  4. Step 4: Simplify right side
    70,849.32x = 3,815,014,876.99
  5. Step 5: Solve for x
    x = 3,815,014,876.99/70,849.32
  6. Step 6: Final answer
    x = 53,846.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.