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Finding the Fourth Proportional to 208,374.65, 287,557.15 and 112,881.72

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Solution

The fourth proportional to 208,374.65, 287,557.15 and 112,881.72 is: 155,776.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,374.65 : 287,557.15 = 112,881.72 : x
  2. Step 2: Convert to fraction form
    208,374.65/287,557.15 = 112,881.72/x
  3. Step 3: Cross multiply
    208,374.65x = 287,557.15 × 112,881.72
  4. Step 4: Simplify right side
    208,374.65x = 32,459,945,408.09
  5. Step 5: Solve for x
    x = 32,459,945,408.09/208,374.65
  6. Step 6: Final answer
    x = 155,776.85

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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.