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Finding the Fourth Proportional to 72,356.70, 108,498.60 and 42,783.60

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Solution

The fourth proportional to 72,356.70, 108,498.60 and 42,783.60 is: 64,153.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,356.70 : 108,498.60 = 42,783.60 : x
  2. Step 2: Convert to fraction form
    72,356.70/108,498.60 = 42,783.60/x
  3. Step 3: Cross multiply
    72,356.70x = 108,498.60 × 42,783.60
  4. Step 4: Simplify right side
    72,356.70x = 4,641,960,702.96
  5. Step 5: Solve for x
    x = 4,641,960,702.96/72,356.70
  6. Step 6: Final answer
    x = 64,153.85

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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.