Home / 78,439.23-108,247.74-42,631.55

Finding the Fourth Proportional to 78,439.23, 108,247.74 and 42,631.55

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Solution

The fourth proportional to 78,439.23, 108,247.74 and 42,631.55 is: 58,832.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,439.23 : 108,247.74 = 42,631.55 : x
  2. Step 2: Convert to fraction form
    78,439.23/108,247.74 = 42,631.55/x
  3. Step 3: Cross multiply
    78,439.23x = 108,247.74 × 42,631.55
  4. Step 4: Simplify right side
    78,439.23x = 4,614,768,185.80
  5. Step 5: Solve for x
    x = 4,614,768,185.80/78,439.23
  6. Step 6: Final answer
    x = 58,832.40

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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.