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Finding the Fourth Proportional to 72,580.61, 108,828.54 and 28,155.45

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Solution

The fourth proportional to 72,580.61, 108,828.54 and 28,155.45 is: 42,216.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,580.61 : 108,828.54 = 28,155.45 : x
  2. Step 2: Convert to fraction form
    72,580.61/108,828.54 = 28,155.45/x
  3. Step 3: Cross multiply
    72,580.61x = 108,828.54 × 28,155.45
  4. Step 4: Simplify right side
    72,580.61x = 3,064,116,375.77
  5. Step 5: Solve for x
    x = 3,064,116,375.77/72,580.61
  6. Step 6: Final answer
    x = 42,216.74

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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.