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Finding the Fourth Proportional to 145,041.88, 200,157.60 and 81,385.60

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Solution

The fourth proportional to 145,041.88, 200,157.60 and 81,385.60 is: 112,312.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,041.88 : 200,157.60 = 81,385.60 : x
  2. Step 2: Convert to fraction form
    145,041.88/200,157.60 = 81,385.60/x
  3. Step 3: Cross multiply
    145,041.88x = 200,157.60 × 81,385.60
  4. Step 4: Simplify right side
    145,041.88x = 16,289,946,370.56
  5. Step 5: Solve for x
    x = 16,289,946,370.56/145,041.88
  6. Step 6: Final answer
    x = 112,312.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.