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Finding the Fourth Proportional to 72,087.78, 108,055.13 and 42,519.54

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Solution

The fourth proportional to 72,087.78, 108,055.13 and 42,519.54 is: 63,734.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,087.78 : 108,055.13 = 42,519.54 : x
  2. Step 2: Convert to fraction form
    72,087.78/108,055.13 = 42,519.54/x
  3. Step 3: Cross multiply
    72,087.78x = 108,055.13 × 42,519.54
  4. Step 4: Simplify right side
    72,087.78x = 4,594,454,209.64
  5. Step 5: Solve for x
    x = 4,594,454,209.64/72,087.78
  6. Step 6: Final answer
    x = 63,734.16

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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.