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Finding the Fourth Proportional to 72,403.60, 108,624.30 and 28,031.80

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Solution

The fourth proportional to 72,403.60, 108,624.30 and 28,031.80 is: 42,055.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,403.60 : 108,624.30 = 28,031.80 : x
  2. Step 2: Convert to fraction form
    72,403.60/108,624.30 = 28,031.80/x
  3. Step 3: Cross multiply
    72,403.60x = 108,624.30 × 28,031.80
  4. Step 4: Simplify right side
    72,403.60x = 3,044,934,652.74
  5. Step 5: Solve for x
    x = 3,044,934,652.74/72,403.60
  6. Step 6: Final answer
    x = 42,055.02

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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.