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Finding the Fourth Proportional to 72,748.80, 109,192.80 and 37,713.60

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Solution

The fourth proportional to 72,748.80, 109,192.80 and 37,713.60 is: 56,606.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,748.80 : 109,192.80 = 37,713.60 : x
  2. Step 2: Convert to fraction form
    72,748.80/109,192.80 = 37,713.60/x
  3. Step 3: Cross multiply
    72,748.80x = 109,192.80 × 37,713.60
  4. Step 4: Simplify right side
    72,748.80x = 4,118,053,582.08
  5. Step 5: Solve for x
    x = 4,118,053,582.08/72,748.80
  6. Step 6: Final answer
    x = 56,606.48

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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.