Home / 85,869.43-128,779.54-28,937.12

Finding the Fourth Proportional to 85,869.43, 128,779.54 and 28,937.12

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Solution

The fourth proportional to 85,869.43, 128,779.54 and 28,937.12 is: 43,397.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,869.43 : 128,779.54 = 28,937.12 : x
  2. Step 2: Convert to fraction form
    85,869.43/128,779.54 = 28,937.12/x
  3. Step 3: Cross multiply
    85,869.43x = 128,779.54 × 28,937.12
  4. Step 4: Simplify right side
    85,869.43x = 3,726,508,286.28
  5. Step 5: Solve for x
    x = 3,726,508,286.28/85,869.43
  6. Step 6: Final answer
    x = 43,397.38

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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.