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Finding the Fourth Proportional to 113,043.80, 156,007.82 and 65,299.16

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Solution

The fourth proportional to 113,043.80, 156,007.82 and 65,299.16 is: 90,117.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,043.80 : 156,007.82 = 65,299.16 : x
  2. Step 2: Convert to fraction form
    113,043.80/156,007.82 = 65,299.16/x
  3. Step 3: Cross multiply
    113,043.80x = 156,007.82 × 65,299.16
  4. Step 4: Simplify right side
    113,043.80x = 10,187,179,599.43
  5. Step 5: Solve for x
    x = 10,187,179,599.43/113,043.80
  6. Step 6: Final answer
    x = 90,117.10

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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.