Home / 78,431.68-108,235.38-42,621.04

Finding the Fourth Proportional to 78,431.68, 108,235.38 and 42,621.04

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Solution

The fourth proportional to 78,431.68, 108,235.38 and 42,621.04 is: 58,816.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,431.68 : 108,235.38 = 42,621.04 : x
  2. Step 2: Convert to fraction form
    78,431.68/108,235.38 = 42,621.04/x
  3. Step 3: Cross multiply
    78,431.68x = 108,235.38 × 42,621.04
  4. Step 4: Simplify right side
    78,431.68x = 4,613,104,460.40
  5. Step 5: Solve for x
    x = 4,613,104,460.40/78,431.68
  6. Step 6: Final answer
    x = 58,816.85

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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.