Home / 112,684.80-155,339.28-85,780.48

Finding the Fourth Proportional to 112,684.80, 155,339.28 and 85,780.48

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Solution

The fourth proportional to 112,684.80, 155,339.28 and 85,780.48 is: 118,250.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,684.80 : 155,339.28 = 85,780.48 : x
  2. Step 2: Convert to fraction form
    112,684.80/155,339.28 = 85,780.48/x
  3. Step 3: Cross multiply
    112,684.80x = 155,339.28 × 85,780.48
  4. Step 4: Simplify right side
    112,684.80x = 13,325,078,001.25
  5. Step 5: Solve for x
    x = 13,325,078,001.25/112,684.80
  6. Step 6: Final answer
    x = 118,250.89

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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.