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Finding the Fourth Proportional to 79,931.10, 112,110.90 and 79,931.10

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Solution

The fourth proportional to 79,931.10, 112,110.90 and 79,931.10 is: 112,110.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,931.10 : 112,110.90 = 79,931.10 : x
  2. Step 2: Convert to fraction form
    79,931.10/112,110.90 = 79,931.10/x
  3. Step 3: Cross multiply
    79,931.10x = 112,110.90 × 79,931.10
  4. Step 4: Simplify right side
    79,931.10x = 8,961,147,558.99
  5. Step 5: Solve for x
    x = 8,961,147,558.99/79,931.10
  6. Step 6: Final answer
    x = 112,110.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.