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Finding the Fourth Proportional to 70,715.30, 106,070.55 and 18,125.30

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Solution

The fourth proportional to 70,715.30, 106,070.55 and 18,125.30 is: 27,187.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,715.30 : 106,070.55 = 18,125.30 : x
  2. Step 2: Convert to fraction form
    70,715.30/106,070.55 = 18,125.30/x
  3. Step 3: Cross multiply
    70,715.30x = 106,070.55 × 18,125.30
  4. Step 4: Simplify right side
    70,715.30x = 1,922,560,539.92
  5. Step 5: Solve for x
    x = 1,922,560,539.92/70,715.30
  6. Step 6: Final answer
    x = 27,187.33

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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.