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Finding the Fourth Proportional to 70,617.99, 97,429.10 and 39,986.91

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Solution

The fourth proportional to 70,617.99, 97,429.10 and 39,986.91 is: 55,168.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,617.99 : 97,429.10 = 39,986.91 : x
  2. Step 2: Convert to fraction form
    70,617.99/97,429.10 = 39,986.91/x
  3. Step 3: Cross multiply
    70,617.99x = 97,429.10 × 39,986.91
  4. Step 4: Simplify right side
    70,617.99x = 3,895,888,453.15
  5. Step 5: Solve for x
    x = 3,895,888,453.15/70,617.99
  6. Step 6: Final answer
    x = 55,168.50

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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.