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Finding the Fourth Proportional to 72,730, 100,368.62 and 47,579.50

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Solution

The fourth proportional to 72,730, 100,368.62 and 47,579.50 is: 65,660.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,730 : 100,368.62 = 47,579.50 : x
  2. Step 2: Convert to fraction form
    72,730/100,368.62 = 47,579.50/x
  3. Step 3: Cross multiply
    72,730x = 100,368.62 × 47,579.50
  4. Step 4: Simplify right side
    72,730x = 4,775,488,755.29
  5. Step 5: Solve for x
    x = 4,775,488,755.29/72,730
  6. Step 6: Final answer
    x = 65,660.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.