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Finding the Fourth Proportional to 207,628.68, 311,443.02 and 57,869.40

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Solution

The fourth proportional to 207,628.68, 311,443.02 and 57,869.40 is: 86,804.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,628.68 : 311,443.02 = 57,869.40 : x
  2. Step 2: Convert to fraction form
    207,628.68/311,443.02 = 57,869.40/x
  3. Step 3: Cross multiply
    207,628.68x = 311,443.02 × 57,869.40
  4. Step 4: Simplify right side
    207,628.68x = 18,023,020,701.59
  5. Step 5: Solve for x
    x = 18,023,020,701.59/207,628.68
  6. Step 6: Final answer
    x = 86,804.10

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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.