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Finding the Fourth Proportional to 72,386.64, 108,511.88 and 39,056.76

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Solution

The fourth proportional to 72,386.64, 108,511.88 and 39,056.76 is: 58,548.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,386.64 : 108,511.88 = 39,056.76 : x
  2. Step 2: Convert to fraction form
    72,386.64/108,511.88 = 39,056.76/x
  3. Step 3: Cross multiply
    72,386.64x = 108,511.88 × 39,056.76
  4. Step 4: Simplify right side
    72,386.64x = 4,238,122,454.31
  5. Step 5: Solve for x
    x = 4,238,122,454.31/72,386.64
  6. Step 6: Final answer
    x = 58,548.41

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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.