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Finding the Fourth Proportional to 104,485.87, 156,728.80 and 42,112.63

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Solution

The fourth proportional to 104,485.87, 156,728.80 and 42,112.63 is: 63,168.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,485.87 : 156,728.80 = 42,112.63 : x
  2. Step 2: Convert to fraction form
    104,485.87/156,728.80 = 42,112.63/x
  3. Step 3: Cross multiply
    104,485.87x = 156,728.80 × 42,112.63
  4. Step 4: Simplify right side
    104,485.87x = 6,600,261,964.74
  5. Step 5: Solve for x
    x = 6,600,261,964.74/104,485.87
  6. Step 6: Final answer
    x = 63,168.94

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1.5x scale

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.