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Finding the Fourth Proportional to 64,923.80, 97,385.70 and 47,209.10

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Solution

The fourth proportional to 64,923.80, 97,385.70 and 47,209.10 is: 70,813.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,923.80 : 97,385.70 = 47,209.10 : x
  2. Step 2: Convert to fraction form
    64,923.80/97,385.70 = 47,209.10/x
  3. Step 3: Cross multiply
    64,923.80x = 97,385.70 × 47,209.10
  4. Step 4: Simplify right side
    64,923.80x = 4,597,491,249.87
  5. Step 5: Solve for x
    x = 4,597,491,249.87/64,923.80
  6. Step 6: Final answer
    x = 70,813.65

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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.