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Finding the Fourth Proportional to 145,042.79, 200,162.50 and 81,385.30

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Solution

The fourth proportional to 145,042.79, 200,162.50 and 81,385.30 is: 112,313.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,042.79 : 200,162.50 = 81,385.30 : x
  2. Step 2: Convert to fraction form
    145,042.79/200,162.50 = 81,385.30/x
  3. Step 3: Cross multiply
    145,042.79x = 200,162.50 × 81,385.30
  4. Step 4: Simplify right side
    145,042.79x = 16,290,284,110.44
  5. Step 5: Solve for x
    x = 16,290,284,110.44/145,042.79
  6. Step 6: Final answer
    x = 112,313.64

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1.5x scale

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.