Home / 81,528.21-112,510.09-49,258.35

Finding the Fourth Proportional to 81,528.21, 112,510.09 and 49,258.35

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Solution

The fourth proportional to 81,528.21, 112,510.09 and 49,258.35 is: 67,977.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,528.21 : 112,510.09 = 49,258.35 : x
  2. Step 2: Convert to fraction form
    81,528.21/112,510.09 = 49,258.35/x
  3. Step 3: Cross multiply
    81,528.21x = 112,510.09 × 49,258.35
  4. Step 4: Simplify right side
    81,528.21x = 5,542,061,391.75
  5. Step 5: Solve for x
    x = 5,542,061,391.75/81,528.21
  6. Step 6: Final answer
    x = 67,977.22

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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.