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Finding the Fourth Proportional to 259,316.76, 388,940.58 and 72,347.16

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Solution

The fourth proportional to 259,316.76, 388,940.58 and 72,347.16 is: 108,511.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,316.76 : 388,940.58 = 72,347.16 : x
  2. Step 2: Convert to fraction form
    259,316.76/388,940.58 = 72,347.16/x
  3. Step 3: Cross multiply
    259,316.76x = 388,940.58 × 72,347.16
  4. Step 4: Simplify right side
    259,316.76x = 28,138,746,371.75
  5. Step 5: Solve for x
    x = 28,138,746,371.75/259,316.76
  6. Step 6: Final answer
    x = 108,511.10

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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.