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Finding the Fourth Proportional to 208,369.40, 287,549.90 and 112,876.47

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Solution

The fourth proportional to 208,369.40, 287,549.90 and 112,876.47 is: 155,769.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,369.40 : 287,549.90 = 112,876.47 : x
  2. Step 2: Convert to fraction form
    208,369.40/287,549.90 = 112,876.47/x
  3. Step 3: Cross multiply
    208,369.40x = 287,549.90 × 112,876.47
  4. Step 4: Simplify right side
    208,369.40x = 32,457,617,519.76
  5. Step 5: Solve for x
    x = 32,457,617,519.76/208,369.40
  6. Step 6: Final answer
    x = 155,769.60

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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.