Home / 72,202.40-99,639.90-39,941.72

Finding the Fourth Proportional to 72,202.40, 99,639.90 and 39,941.72

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Solution

The fourth proportional to 72,202.40, 99,639.90 and 39,941.72 is: 55,119.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,202.40 : 99,639.90 = 39,941.72 : x
  2. Step 2: Convert to fraction form
    72,202.40/99,639.90 = 39,941.72/x
  3. Step 3: Cross multiply
    72,202.40x = 99,639.90 × 39,941.72
  4. Step 4: Simplify right side
    72,202.40x = 3,979,788,986.63
  5. Step 5: Solve for x
    x = 3,979,788,986.63/72,202.40
  6. Step 6: Final answer
    x = 55,119.90

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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.