Home / 71,812.40-99,099.72-39,981.92

Finding the Fourth Proportional to 71,812.40, 99,099.72 and 39,981.92

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Solution

The fourth proportional to 71,812.40, 99,099.72 and 39,981.92 is: 55,174.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,812.40 : 99,099.72 = 39,981.92 : x
  2. Step 2: Convert to fraction form
    71,812.40/99,099.72 = 39,981.92/x
  3. Step 3: Cross multiply
    71,812.40x = 99,099.72 × 39,981.92
  4. Step 4: Simplify right side
    71,812.40x = 3,962,197,077.06
  5. Step 5: Solve for x
    x = 3,962,197,077.06/71,812.40
  6. Step 6: Final answer
    x = 55,174.27

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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.