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Finding the Fourth Proportional to 208,632.41, 287,912.88 and 113,139.08

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Solution

The fourth proportional to 208,632.41, 287,912.88 and 113,139.08 is: 156,132.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,632.41 : 287,912.88 = 113,139.08 : x
  2. Step 2: Convert to fraction form
    208,632.41/287,912.88 = 113,139.08/x
  3. Step 3: Cross multiply
    208,632.41x = 287,912.88 × 113,139.08
  4. Step 4: Simplify right side
    208,632.41x = 32,574,198,363.35
  5. Step 5: Solve for x
    x = 32,574,198,363.35/208,632.41
  6. Step 6: Final answer
    x = 156,132.01

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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.