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Finding the Fourth Proportional to 259,313.76, 388,936.08 and 72,344.16

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Solution

The fourth proportional to 259,313.76, 388,936.08 and 72,344.16 is: 108,506.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,313.76 : 388,936.08 = 72,344.16 : x
  2. Step 2: Convert to fraction form
    259,313.76/388,936.08 = 72,344.16/x
  3. Step 3: Cross multiply
    259,313.76x = 388,936.08 × 72,344.16
  4. Step 4: Simplify right side
    259,313.76x = 28,137,254,001.29
  5. Step 5: Solve for x
    x = 28,137,254,001.29/259,313.76
  6. Step 6: Final answer
    x = 108,506.60

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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.