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Finding the Fourth Proportional to 72,290.80, 108,349.80 and 37,212.40

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Solution

The fourth proportional to 72,290.80, 108,349.80 and 37,212.40 is: 55,774.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,290.80 : 108,349.80 = 37,212.40 : x
  2. Step 2: Convert to fraction form
    72,290.80/108,349.80 = 37,212.40/x
  3. Step 3: Cross multiply
    72,290.80x = 108,349.80 × 37,212.40
  4. Step 4: Simplify right side
    72,290.80x = 4,031,956,097.52
  5. Step 5: Solve for x
    x = 4,031,956,097.52/72,290.80
  6. Step 6: Final answer
    x = 55,774.12

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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.