Home / 112,639.60-155,440.38-64,891.72

Finding the Fourth Proportional to 112,639.60, 155,440.38 and 64,891.72

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Solution

The fourth proportional to 112,639.60, 155,440.38 and 64,891.72 is: 89,549.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,639.60 : 155,440.38 = 64,891.72 : x
  2. Step 2: Convert to fraction form
    112,639.60/155,440.38 = 64,891.72/x
  3. Step 3: Cross multiply
    112,639.60x = 155,440.38 × 64,891.72
  4. Step 4: Simplify right side
    112,639.60x = 10,086,793,615.65
  5. Step 5: Solve for x
    x = 10,086,793,615.65/112,639.60
  6. Step 6: Final answer
    x = 89,549.27

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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.