Home / 90,779.68-136,169.56-28,455.04

Finding the Fourth Proportional to 90,779.68, 136,169.56 and 28,455.04

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Solution

The fourth proportional to 90,779.68, 136,169.56 and 28,455.04 is: 42,682.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,779.68 : 136,169.56 = 28,455.04 : x
  2. Step 2: Convert to fraction form
    90,779.68/136,169.56 = 28,455.04/x
  3. Step 3: Cross multiply
    90,779.68x = 136,169.56 × 28,455.04
  4. Step 4: Simplify right side
    90,779.68x = 3,874,710,276.58
  5. Step 5: Solve for x
    x = 3,874,710,276.58/90,779.68
  6. Step 6: Final answer
    x = 42,682.57

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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.