Home / 112,772.40-168,691.12-85,915.19

Finding the Fourth Proportional to 112,772.40, 168,691.12 and 85,915.19

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Solution

The fourth proportional to 112,772.40, 168,691.12 and 85,915.19 is: 128,516.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,772.40 : 168,691.12 = 85,915.19 : x
  2. Step 2: Convert to fraction form
    112,772.40/168,691.12 = 85,915.19/x
  3. Step 3: Cross multiply
    112,772.40x = 168,691.12 × 85,915.19
  4. Step 4: Simplify right side
    112,772.40x = 14,493,129,626.11
  5. Step 5: Solve for x
    x = 14,493,129,626.11/112,772.40
  6. Step 6: Final answer
    x = 128,516.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.