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Finding the Fourth Proportional to 72,478.89, 108,594.40 and 56,677.82

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Solution

The fourth proportional to 72,478.89, 108,594.40 and 56,677.82 is: 84,919.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,478.89 : 108,594.40 = 56,677.82 : x
  2. Step 2: Convert to fraction form
    72,478.89/108,594.40 = 56,677.82/x
  3. Step 3: Cross multiply
    72,478.89x = 108,594.40 × 56,677.82
  4. Step 4: Simplify right side
    72,478.89x = 6,154,893,856.21
  5. Step 5: Solve for x
    x = 6,154,893,856.21/72,478.89
  6. Step 6: Final answer
    x = 84,919.81

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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.