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Finding the Fourth Proportional to 70,992.45, 97,969.68 and 40,783.65

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Solution

The fourth proportional to 70,992.45, 97,969.68 and 40,783.65 is: 56,281.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,992.45 : 97,969.68 = 40,783.65 : x
  2. Step 2: Convert to fraction form
    70,992.45/97,969.68 = 40,783.65/x
  3. Step 3: Cross multiply
    70,992.45x = 97,969.68 × 40,783.65
  4. Step 4: Simplify right side
    70,992.45x = 3,995,561,139.73
  5. Step 5: Solve for x
    x = 3,995,561,139.73/70,992.45
  6. Step 6: Final answer
    x = 56,281.49

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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.