Home / 81,289.13-112,217.35-61,153.68

Finding the Fourth Proportional to 81,289.13, 112,217.35 and 61,153.68

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Solution

The fourth proportional to 81,289.13, 112,217.35 and 61,153.68 is: 84,420.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,289.13 : 112,217.35 = 61,153.68 : x
  2. Step 2: Convert to fraction form
    81,289.13/112,217.35 = 61,153.68/x
  3. Step 3: Cross multiply
    81,289.13x = 112,217.35 × 61,153.68
  4. Step 4: Simplify right side
    81,289.13x = 6,862,503,912.35
  5. Step 5: Solve for x
    x = 6,862,503,912.35/81,289.13
  6. Step 6: Final answer
    x = 84,420.93

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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.