Home / 105,100.20-145,035.54-57,354.12

Finding the Fourth Proportional to 105,100.20, 145,035.54 and 57,354.12

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Solution

The fourth proportional to 105,100.20, 145,035.54 and 57,354.12 is: 79,147.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,100.20 : 145,035.54 = 57,354.12 : x
  2. Step 2: Convert to fraction form
    105,100.20/145,035.54 = 57,354.12/x
  3. Step 3: Cross multiply
    105,100.20x = 145,035.54 × 57,354.12
  4. Step 4: Simplify right side
    105,100.20x = 8,318,385,765.42
  5. Step 5: Solve for x
    x = 8,318,385,765.42/105,100.20
  6. Step 6: Final answer
    x = 79,147.19

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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.