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Finding the Fourth Proportional to 104,364.80, 156,316.80 and 42,003.20

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Solution

The fourth proportional to 104,364.80, 156,316.80 and 42,003.20 is: 62,912.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,364.80 : 156,316.80 = 42,003.20 : x
  2. Step 2: Convert to fraction form
    104,364.80/156,316.80 = 42,003.20/x
  3. Step 3: Cross multiply
    104,364.80x = 156,316.80 × 42,003.20
  4. Step 4: Simplify right side
    104,364.80x = 6,565,805,813.76
  5. Step 5: Solve for x
    x = 6,565,805,813.76/104,364.80
  6. Step 6: Final answer
    x = 62,912.07

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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.