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Finding the Fourth Proportional to 208,128.84, 287,217.78 and 112,635.56

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Solution

The fourth proportional to 208,128.84, 287,217.78 and 112,635.56 is: 155,437.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,128.84 : 287,217.78 = 112,635.56 : x
  2. Step 2: Convert to fraction form
    208,128.84/287,217.78 = 112,635.56/x
  3. Step 3: Cross multiply
    208,128.84x = 287,217.78 × 112,635.56
  4. Step 4: Simplify right side
    208,128.84x = 32,350,934,056.17
  5. Step 5: Solve for x
    x = 32,350,934,056.17/208,128.84
  6. Step 6: Final answer
    x = 155,437.06

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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.