Home / 90,219.15-135,256.64-42,810.39

Finding the Fourth Proportional to 90,219.15, 135,256.64 and 42,810.39

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Solution

The fourth proportional to 90,219.15, 135,256.64 and 42,810.39 is: 64,181.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,219.15 : 135,256.64 = 42,810.39 : x
  2. Step 2: Convert to fraction form
    90,219.15/135,256.64 = 42,810.39/x
  3. Step 3: Cross multiply
    90,219.15x = 135,256.64 × 42,810.39
  4. Step 4: Simplify right side
    90,219.15x = 5,790,389,294.44
  5. Step 5: Solve for x
    x = 5,790,389,294.44/90,219.15
  6. Step 6: Final answer
    x = 64,181.38

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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.