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Finding the Fourth Proportional to 72,186.08, 108,275.68 and 18,878.08

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Solution

The fourth proportional to 72,186.08, 108,275.68 and 18,878.08 is: 28,316.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,186.08 : 108,275.68 = 18,878.08 : x
  2. Step 2: Convert to fraction form
    72,186.08/108,275.68 = 18,878.08/x
  3. Step 3: Cross multiply
    72,186.08x = 108,275.68 × 18,878.08
  4. Step 4: Simplify right side
    72,186.08x = 2,044,036,949.09
  5. Step 5: Solve for x
    x = 2,044,036,949.09/72,186.08
  6. Step 6: Final answer
    x = 28,316.22

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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.