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Finding the Fourth Proportional to 208,483.28, 287,707.42 and 112,989.95

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Solution

The fourth proportional to 208,483.28, 287,707.42 and 112,989.95 is: 155,926.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,483.28 : 287,707.42 = 112,989.95 : x
  2. Step 2: Convert to fraction form
    208,483.28/287,707.42 = 112,989.95/x
  3. Step 3: Cross multiply
    208,483.28x = 287,707.42 × 112,989.95
  4. Step 4: Simplify right side
    208,483.28x = 32,508,047,000.43
  5. Step 5: Solve for x
    x = 32,508,047,000.43/208,483.28
  6. Step 6: Final answer
    x = 155,926.40

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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.