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Finding the Fourth Proportional to 72,465.92, 108,538.28 and 55,702.56

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Solution

The fourth proportional to 72,465.92, 108,538.28 and 55,702.56 is: 83,430.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,465.92 : 108,538.28 = 55,702.56 : x
  2. Step 2: Convert to fraction form
    72,465.92/108,538.28 = 55,702.56/x
  3. Step 3: Cross multiply
    72,465.92x = 108,538.28 × 55,702.56
  4. Step 4: Simplify right side
    72,465.92x = 6,045,860,054.00
  5. Step 5: Solve for x
    x = 6,045,860,054.00/72,465.92
  6. Step 6: Final answer
    x = 83,430.39

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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.