Home / 90,108.16-135,128.64-30,927.04

Finding the Fourth Proportional to 90,108.16, 135,128.64 and 30,927.04

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Solution

The fourth proportional to 90,108.16, 135,128.64 and 30,927.04 is: 46,379.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,108.16 : 135,128.64 = 30,927.04 : x
  2. Step 2: Convert to fraction form
    90,108.16/135,128.64 = 30,927.04/x
  3. Step 3: Cross multiply
    90,108.16x = 135,128.64 × 30,927.04
  4. Step 4: Simplify right side
    90,108.16x = 4,179,128,854.43
  5. Step 5: Solve for x
    x = 4,179,128,854.43/90,108.16
  6. Step 6: Final answer
    x = 46,379.03

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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.