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Finding the Fourth Proportional to 112,779.60, 155,630.34 and 65,033.88

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Solution

The fourth proportional to 112,779.60, 155,630.34 and 65,033.88 is: 89,743.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,779.60 : 155,630.34 = 65,033.88 : x
  2. Step 2: Convert to fraction form
    112,779.60/155,630.34 = 65,033.88/x
  3. Step 3: Cross multiply
    112,779.60x = 155,630.34 × 65,033.88
  4. Step 4: Simplify right side
    112,779.60x = 10,121,244,855.92
  5. Step 5: Solve for x
    x = 10,121,244,855.92/112,779.60
  6. Step 6: Final answer
    x = 89,743.58

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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.